Document:

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                                                                    Exhibit 4.15

                                SIXTH AMENDMENT

                                      TO

                          SECOND AMENDED AND RESTATED

                       AGREEMENT OF LIMITED PARTNERSHIP

                                      OF

                       CABOT INDUSTRIAL PROPERTIES, L.P.

     THIS SIXTH AMENDMENT TO SECOND AMENDED AND RESTATED AGREEMENT OF LIMITED
PARTNERSHIP (this "Amendment") dated as of March 23, 1999, is entered into by
CABOT INDUSTRIAL TRUST, a Maryland real estate investment trust, as general
partner (the "General Partner") of CABOT INDUSTRIAL PROPERTIES, L.P. (the
"Partnership"), for itself and on behalf of the limited partners of the
Partnership, and J.P. MORGAN EMERGING TECHNOLOGY EXCHANGE FUND, LLC, a Delaware
limited liability company ("Contributor").

     WHEREAS, Section 4.2(a) of the Second Amended and Restated Agreement of
Limited Partnership of the Partnership (the "Partnership Agreement") authorizes
the General Partner to cause the Partnership to issue additional Partnership
Units in one or more classes or series, with such designations, preferences and
relative, participating, optional or other special rights, powers and duties as
shall be determined by the General Partner, subject to the provisions of such
section; and

     WHEREAS, pursuant to the authority granted to the General Partner pursuant
to Sections 4.2(a) and 14.1(b) of the Partnership Agreement, the General Partner
desires to amend the Partnership Agreement (i) to establish a new class of
Partnership Units, the Series G Preferred Units (as hereinafter defined), and to
set forth the designations, rights, powers, preferences and duties of such
Series G Preferred Units, (ii) to issue the Series G Preferred Units to
Contributor and admit Contributor as an Additional Limited Partner and (iii) to
make certain other changes to the Partnership Agreement.

     NOW, THEREFORE, in consideration of good and valuable consideration, the
receipt and sufficiency of which hereby are acknowledged, the General Partner
hereby amends the Partnership Agreement as follows:

          Section 1. Definitions. For purposes of this Amendment, the term
                     -----------
"Parity Preferred Units" shall be used to refer to any class or series of
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Partnership Interests of the Partnership now or hereafter authorized, issued or
outstanding expressly designated by the
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Partnership to rank on a parity with Series G Preferred Units with respect to
distributions and rights upon voluntary or involuntary liquidation, winding-up
or dissolution of the Partnership. The term "Priority Return" shall mean an
                                             ---------------
amount equal to 8.875% per annum, determined on the basis of a 360 day year of
twelve 30 day months, cumulative to the extent not distributed for any given
distribution period pursuant to Section 5.1 of the Partnership Agreement, of the
stated value of $25 per Series G Preferred Unit, commencing on the date of
issuance of such Series G Preferred Unit. The term "Subsidiary" shall mean with
                                                    ----------
respect to any person, any corporation, partnership, limited liability company,
joint venture or other entity of which a majority of(i) voting power of the
voting equity securities or (ii) the outstanding equity interests, is owned,
directly or indirectly, by such person. The term "PTP" shall mean a "publicly
                                                  ---
traded partnership" within the meaning of Section 7704 of the Code. Capitalized
terms used herein and not otherwise defined herein shall have the meanings
ascribed to them in the Partnership Agreement.

          Section 2. Designation and Number. A series of Partnership Units in
                     ----------------------
the Partnership designated as the "8.875% Series G Cumulative Redeemable
Preferred Units" (the "Series G Preferred Units") is hereby established. The
                       ------------------------
number of Series G Preferred Units shall be 600,000.

          Section 3. Distributions. (a) Payment of Distributions. Subject to the
                     -------------      ------------------------
rights of holders of Parity Preferred Units as to the payment of distributions,
pursuant to Section 5.1 of the Partnership Agreement, holders of Series G
Preferred Units shall be entitled to receive, when, as and if declared by the
Partnership acting through the General Partner, out of Available Cash,
cumulative preferential cash distributions at the rate per annum of 8.875% of
the original Capital Contribution per Series G Preferred Unit. Such
distributions shall be cumulative, shall accrue from the original date of
issuance and will be payable (i) quarterly in arrears, on March 25, June 25,
September 25 and December 25 of each year commencing on June 25, 2000 and, (ii),
in the event of (A) an exchange of Series G Preferred Units into Series G
Preferred Shares (as hereinafter defined), or (B) a redemption of Series G
Preferred Units, on the exchange date or redemption date, as applicable (each a
"Preferred Unit Distribution Payment Date"). The amount of the distribution
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payable for any period will be computed on the basis of a 360-day year of twelve
30-day months and for any period shorter than a full quarterly period for which
distributions are computed, the amount of the distribution payable will be
computed on the basis of the actual number of days elapsed in such period. If
any date on which distributions are to be made on the Series G Preferred Units
is not a Business Day (as defined herein), then payment of the distribution to
be made on such date will be made on the next succeeding day that is a Business
Day (and without any interest or other payment in respect of any such delay)
except that, if such Business Day is in the next succeeding calendar year, such
payment shall be made on the immediately preceding Business Day, in each case
with the same force and effect as if made on such date. Distributions on the
Series G Preferred Units will be made to the holders of record of the Series G
Preferred Units on the relevant record dates to be fixed by the Partnership
acting through the General Partner, which record dates shall in no event exceed
fifteen (15) Business Days prior to the relevant Preferred Unit Distribution
Payment Date (the "Preferred Unit Partnership Record Date").
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     The term "Business Day" shall mean each day other than a Saturday or a
Sunday, which is not a day on which banking institutions in New York, New York
are authorized or required by law, regulations or executive order to close.

          (b) Distributions Cumulative. Distributions on the Series G Preferred
              ------------------------
Units will accrue whether or not the terms and provisions of any agreement of
the Partnership, including any agreement relating to its indebtedness, at any
time prohibit the current payment of distributions, whether or not the
Partnership has earnings, whether or not there are funds legally available for
the payment of such distributions and whether or not such distributions are
authorized. Accrued but unpaid distributions on the Series G Preferred Units
will accumulate as of the Preferred Unit Distribution Payment Date on which they
first become payable. Distributions on account of arrears for any past
distribution periods may be declared and paid at any time, without reference to
a regular Preferred Unit Distribution Payment Date to holders of record of the
Series G Preferred Units on the record date fixed by the Partnership acting
through the General Partner, which date shall not exceed fifteen (15) Business
Days prior to the payment date. Accumulated and unpaid distributions will not
bear interest.

          (c) Priority as to Distributions. (i) So long as any Series G
              ----------------------------
Preferred Units are outstanding, no distribution of cash or other property shall
be authorized, declared, paid or set apart for payment on or with respect to any
class or series of Partnership Interests of the Partnership ranking junior as to
the payment of distributions or rights upon a voluntary or involuntary
liquidation, dissolution or winding-up of the Partnership to the Series G
Preferred Units (collectively, "Junior Units"), nor shall any cash or other
                                ------------
property be set aside for or applied to the purchase, redemption or other
acquisition for consideration of any Series G Preferred Units, any Parity
Preferred Units or any Junior Units, unless, in each case, all distributions
accumulated on all Series G Preferred Units and all classes and series of
outstanding Parity Preferred Units have been paid in full. The foregoing
sentence will not prohibit (a) distributions payable solely in Junior Units, (b)
the conversion of Junior Units or Parity Preferred Units into Partnership Units
ranking junior to the Series G Preferred Units as to distributions and upon
liquidation, winding-up or dissolution or (c) the redemption of Partnership
Interests corresponding to any Series G Preferred Shares (as hereinafter
defined), Parity Preferred Shares (as such term is defined in the Declaration of
Trust of the General Partner, as supplemented (the "Charter")), or Junior Shares
                                                    -------
(as such term is defined in the Charter) to be purchased by the General Partner
pursuant to Article 3 of the Charter to preserve the General Partner's status as
a real estate investment trust, provided that such redemption shall be upon the
same terms as the corresponding purchase pursuant to Article 3 of the Charter.

          (ii) So long as distributions have not been paid in full (or a sum
     sufficient for such full payment is not irrevocably deposited in trust for
     payment) upon the Series G

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     Preferred Units, all distributions authorized and declared on the Series G
     Preferred Units and all classes or series of outstanding Parity Preferred
     Units shall be authorized and declared so that the amount of distributions
     authorized and declared per Series G Preferred Unit and such other classes
     or series of Parity Preferred Units shall in all cases bear to each other
     the same ratio that accrued distributions per Series G Preferred Unit and
     such other classes or series of Parity Preferred Units (which shall not
     include any accumulation in respect of unpaid distributions for prior
     distribution periods if such class or series of Parity Preferred Units do
     not have cumulative distribution rights) bear to each other.

          (d) No Further Rights. Holders of Series G Preferred Units shall not
              -----------------
be entitled to any distributions, whether payable in cash, other property or
otherwise, in excess of the full cumulative distributions described herein.

     Section 4. Liquidation Proceeds. (a) Upon voluntary or involuntary
                --------------------
liquidation, dissolution or winding-up of the Partnership, distributions on the
Series G Preferred Units shall be made in accordance with Section 13.2 of the
Partnership Agreement.

          (b) Notice. Written notice of any such voluntary or involuntary
              ------
liquidation, dissolution or winding-up of the Partnership, stating the payment
date or dates when, and the place or places where, the amounts distributable in
such circumstances shall be payable, shall be given by (i) fax and (ii) by first
class mail, postage pre-paid, not less than thirty (30) and not more than sixty
(60) days prior to the payment date stated therein, to each record holder of the
Series G Preferred Units at the respective addresses of such holders as the same
shall appear on the transfer records of the Partnership.

          (c) No Further Rights. After payment of the full amount of the
              -----------------
liquidating distributions to which they are entitled, the holders of Series G
Preferred Units will have no right or claim to any of the remaining assets of
the Partnership.

          (d) Consolidation, Merger or Certain Other Transactions. The voluntary
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sale, conveyance, lease, exchange or transfer (for cash, shares of stock,
securities or other consideration) of all or substantially all of the property
or assets of the General Partner to, or the consolidation or merger or other
business combination of the Partnership with or into, any corporation, trust,
partnership, limited liability company or other entity (or of any corporation,
trust, partnership, limited liability company or other entity with or into the
Partnership) shall not be deemed to constitute a liquidation, dissolution or
winding-up of the Partnership.

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     Section 5. Optional Redemption. (a) Right of Optional Redemption. The
                -------------------      ----------------------------
Series G Preferred Units may not be redeemed prior to the fifth (5th)
anniversary of the issuance date. On or after such date, the Partnership shall
have the right to redeem the Series G Preferred Units, in whole or in part, at
any time or from time to time, upon not less than thirty (30) nor more than
sixty (60) days' written notice, at a redemption price, payable in cash, equal
to the Capital Account balance of the holders of Series G Preferred Units (the
"Redemption Price"); provided, however, that no redemption pursuant to this
 ----------------
Section 5 will be permitted if the Redemption Price does not equal or exceed the
original Capital Contribution of such holder plus the cumulative Priority
Return, whether or not declared, to the redemption date to the extent not
previously distributed pursuant to Section 3(a). If fewer than all of the
outstanding Series G Preferred Units are to be redeemed, the Series G Preferred
Units to be redeemed shall be selected pro rata (as nearly as practicable
without creating fractional units).

          (b) Limitation on Redemption. The Partnership may not redeem fewer
              ------------------------
than all of the outstanding Series G Preferred Units unless all accumulated and
unpaid distributions have been paid on all Series G Preferred Units for all
quarterly distribution periods terminating on or prior to the date of
redemption.

          (c) Procedures for Redemption. (i) Notice of redemption will be (A)
              -------------------------
faxed, and (B) mailed by the Partnership, by certified mail, postage prepaid,
not less than thirty (30) nor more than sixty (60) days prior to the redemption
date, addressed to the respective holders of record of the Series G Preferred
Units at their respective addresses as they appear on the records of the
Partnership. No failure to give or defect in such notice shall affect the
validity of the proceedings for the redemption of any Series G Preferred Units
except as to the holder to whom such notice was defective or not given. In
addition to any information required by law, each such notice shall state: (1)
the redemption date, (2) the Redemption Price, (3) the aggregate number of
Series G Preferred Units to be redeemed and if fewer than all of the outstanding
Series G Preferred Units are to be redeemed, the number of Series G Preferred
Units to be redeemed held by such holder, which number shall equal such holder's
pro rata share (based on the percentage of the aggregate number of outstanding
Series G Preferred Units the total number of Series G Preferred Units held by
such holder represents) of the aggregate number of Series G Preferred Units to
be redeemed, (4) the place or places where such Series G Preferred Units are to
be surrendered for payment of the Redemption Price, (5) that distributions on
the Series G Preferred Units to be redeemed will cease to accumulate on such
redemption date and (6) that payment of the Redemption Price will be made upon
presentation and surrender of such Series G Preferred Units.

          (ii) If the Partnership gives a notice of redemption in respect of
     Series G Preferred Units (which notice will be irrevocable) then, by 12:00
     noon, New York City time, on the redemption date, the Partnership will
     deposit irrevocably in trust for the benefit of the

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     Series G Preferred Units being redeemed funds sufficient to pay the
     applicable Redemption Price and will give irrevocable instructions and
     authority to pay such Redemption Price to the holders of the Series G
     Preferred Units upon surrender of the Series G Preferred Units by such
     holders at the place designated in the notice of redemption. If the Series
     G Preferred Units are evidenced by a certificate and if fewer than all
     Series G Preferred Units evidenced by any certificate are being redeemed, a
     new certificate shall be issued upon surrender of the certificate
     evidencing all Series G Preferred Units, evidencing the unredeemed Series G
     Preferred Units without cost to the holder thereof. On and after the date
     of redemption, distributions will cease to accumulate on the Series G
     Preferred Units or portions thereof called for redemption, unless the
     Partnership defaults in the payment thereof. If any date fixed for
     redemption of Series G Preferred Units is not a Business Day, then payment
     of the Redemption Price payable on such date will be made on the next
     succeeding day that is a Business Day (and without any interest or other
     payment in respect of any such delay) except that, if such Business Day
     falls in the next calendar year, such payment will be made on the
     immediately preceding Business Day, in each case with the same force and
     effect as if made on such date fixed for redemption. If payment of the
     Redemption Price is improperly withheld or refused and not paid by the
     Partnership, distributions on such Series G Preferred Units will continue
     to accumulate from the original redemption date to the date of payment, in
     which case the actual payment date will be considered the date fixed for
     redemption for purposes of calculating the applicable Redemption Price.

     Section 6. Voting Rights. (a) General. Holders of the Series G Preferred
                -------------      -------
Units will not have any voting rights or right to consent to any matter
requiring the consent or approval of the Limited Partners, except as set forth
in the Partnership Agreement and except as set forth below. In the event of a
conflict between the terms of this Section 6 and any other terms of this
Amendment, the terms of this Section 6 shall control.

          (b) Certain Voting Rights. So long as any Series G Preferred Units
              ---------------------
remain outstanding, the Partnership shall not, without the affirmative vote of
the holders of at least two-thirds of the Series G Preferred Units outstanding
at the time (i) authorize or create, or increase the authorized or issued amount
of, any class or series of Partnership Interests senior to the Series G
Preferred Units with respect to payment of distributions or rights upon
liquidation, dissolution or winding-up of the Partnership or reclassify any
Partnership Interests of the Partnership into any such senior Partnership
Interests, or create, authorize or issue any obligations or security convertible
into or evidencing the right to purchase any such senior Partnership Interests,
(ii) authorize or create, or increase the authorized or issued amount of any
Parity Preferred Units or reclassify any Partnership Interest into any such
Partnership Interest or create, authorize or issue any obligations or security
convertible into or evidencing the right to purchase any such Partnership
Interests but only to the extent such Parity Preferred Units are issued to an
Affiliate of the Partnership, other than the General Partner to the extent the
issuance of such interests was to allow the General Partner to issue
corresponding preferred stock to persons who are not Affiliates of the
Partnership (or to Affiliates

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purchasing the preferred stock on the same terms as non-affiliated purchasers)
or (iii) either (A) consolidate, merge into or with, or convey, transfer or
lease all or substantially all of its assets to, any corporation or other entity
or (B) amend, alter or repeal the provisions of the Partnership Agreement
whether by merger, consolidation or otherwise, that would materially and
adversely affect the powers, special rights, preferences, privileges or voting
power of the Series G Preferred Units or the holders thereof; provided, however,
that with respect to the occurrence of a merger, consolidation or a sale or
lease of all or substantially all of the Partnership's assets as an entirety, so
long as (1) the Partnership is the surviving entity and the Series G Preferred
Units remain outstanding with the terms thereof unchanged, or (2) the resulting,
surviving or transferee entity is a partnership, limited liability company or
other pass-through entity organized under the laws of any state and substitutes
the Series G Preferred Units for other interests in such entity having
substantially the same terms and rights as the Series G Preferred Units,
including with respect to distributions, voting rights and rights upon
liquidation, dissolution or winding-up of such entity, then the occurrence of
any such event shall not be deemed to materially and adversely affect such
rights, privileges or voting powers of the holders of the Series G Preferred
Units and no vote of the Series G Preferred Units shall be required in such
case; and provided further that any increase in the amount of Partnership
Interests or the creation or issuance of any other class or series of
Partnership Interests, in each case ranking (y) junior to the Series G Preferred
Units with respect to payment of distributions or the distribution of assets
upon liquidation, dissolution or winding-up of the Partnership, or (z) on a
parity with the Series G Preferred Units with respect to payment of
distributions and the distribution of assets upon liquidation, dissolution or
winding-up of the Partnership to the extent such Partnership Interests are not
issued to an Affiliate, other than the General Partner to the extent the
issuance of such interests was to allow the General Partner to issue
corresponding preferred stock to persons who are not Affiliates, shall not be
deemed to materially and adversely affect such rights, preferences, privileges
or voting powers and no vote of the Series G Preferred Units shall be required
in such case.

     Section 7. Transfer Restrictions. The Series G Preferred Units shall be
                ---------------------
subject to the provisions of Article XI of the Partnership Agreement, provided,
however, that (i) the General Partner shall act reasonably in exercising its
discretion pursuant to the provisions of Section 11.4(a)(ii) with respect to
transferees of Series G Preferred Units, (ii) the provisions of Clause B of
Section 11.3(d) shall not be applicable to holders of Series G Preferred Units
if at the time of such transfer, the Partnership already has 100 Partners; (iii)
if only a portion of the Series G Preferred Units shall be transferred, the
transferee of such transferred Series G Preferred Units shall, subject to the
provisions of Section 11.4, be substituted as a Limited Partner in place of the
transferring holders only as to the Series G Preferred Units so transferred; and
(iv) the provisions of Sections 11.6(c) and 11.6(d) shall not be applicable to
any transfer of Series G Preferred Units; and provided further that "transfer"
when used in Article XI shall not be deemed to include any exchange pursuant to
Section 8 below.

     Section 8. Exchange Rights. (a) Right to Exchange.
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          (i) Series G Preferred Units will be exchangeable in whole or in part
     at anytime on or after the tenth (10th) anniversary of the date of
     issuance, at the option of the holders thereof, for authorized but
     previously unissued shares of 8.875% Series G Cumulative Redeemable
     Preferred Shares of the General Partner (the "Series G Preferred Shares")
                                                   -------------------------
     at an exchange rate of one Series G Preferred Share for one Series G
     Preferred Unit, subject to adjustment as described below (the "Exchange
                                                                    --------
     Price"), provided that the Series G Preferred Units will become
     -----
     exchangeable at any time, in whole or in part, at the option of the holders
     of Series G Units, for Series G Preferred Shares if (y) at any time full
     distributions shall not have been timely made on any Series G Preferred
     Unit with respect to six (6) prior quarterly distribution periods, whether
     or not consecutive; provided, however, that a distribution in respect of
     Series G Preferred Units shall be considered timely made if made within two
     (2) Business Days after the applicable Preferred Unit Distribution Payment
     Date if at the time of such late payment there shall not be any prior
     quarterly distribution periods in respect of which full distributions were
     not timely made or (z) upon receipt by a holder or holders of Series G
     Preferred Units of (1) a notice from the General Partner that the General
     Partner or a Subsidiary of the General Partner has taken the position that
     the Partnership is, or upon the occurrence of a defined event in the
     immediate future will be, a PTP and (2) an opinion rendered by an outside
     nationally recognized independent counsel familiar with such matters
     addressed to a holder or holders of Series G Preferred Units, that the
     Partnership is or likely is, or upon the occurrence of a defined event in
     the immediate future will be or likely will be, a PTP. In addition, the
     Series G Preferred Units may be exchanged for Series G Preferred Shares, in
     whole or in part, at the option of any holder prior to the tenth (10th)
     anniversary of the issuance date and after the third (3rd) anniversary
     thereof if such holder of a Series G Preferred Units shall deliver to the
     General Partner either (i) a private letter ruling addressed to such holder
     of Series G Preferred Units or (ii) an opinion of independent counsel
     reasonably acceptable to the General Partner based on the enactment of a
     statute, temporary or final Treasury Regulations or the publication of a
     Revenue Ruling, in either case to the effect that an exchange of the Series
     G Preferred Units at such earlier time would not cause the Series G
     Preferred Units to be considered "stock or securities" within the meaning
     of Section 351(e) of the Code for purposes of determining whether the
     holder of such Series G Preferred Units is an "investment company" under
     Section 721(b) of the Code if an exchange is permitted at such earlier
     date. Furthermore, all the Series G Preferred Units, held by any holder
     thereof which is a real estate investment trust within the meaning of
     Sections 856 through 859 of the Code for Series G Preferred Shares may be
     exchanged in whole but not in part (but only if the exchange may be
     accomplished consistently with the ownership limitations set forth under
     Article 3 of the Charter (taking into account exceptions thereto)) if at
     any time, (I) the Partnership reasonably determines that the assets and
     income of the Partnership for a taxable year after 1999 would not satisfy
     the income and assets tests of Section 856 of the Code for such taxable
     year if the Partnership were a real estate investment trust within the
     meaning of the Code or (ii) any such holder of Series G Preferred Units
     shall deliver to the Partnership and the General Partner an opinion of
     independent counsel reasonably acceptable to the General Partner to the
     effect that, based on the assets and income of the Partnership for a
     taxable year

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     after 1999, the Partnership would not satisfy the income assets tests of
     Section 856 of the Code for such taxable year if the Partnership were a
     real estate investment trust within the meaning of the Code and that such
     failure would create a meaningful risk that a holder of the Series G
     Preferred Units would fail to maintain qualification as a real estate
     investment trust.

          (ii) Notwithstanding anything to the contrary set forth in Section
     8(a)(i) hereof, if an Exchange Notice (as defined herein) has been
     delivered to the General Partner, then the General Partner may, at its
     option, elect to redeem or cause the Partnership to redeem all or a portion
     of the outstanding Series G Preferred Units for cash in an amount equal to
     the original Capital Contribution per Series G Preferred Unit and all
     accrued and unpaid distributions thereon to the date of redemption. The
     General Partner may exercise its option to redeem the Series G Preferred
     Units for cash pursuant to this Section 8(a)(ii) hereof by giving each
     holder of record of Series G Preferred Units notice of its election to
     redeem for cash, within ten (10) Business Days after receipt of the
     Exchange Notice, by (y) fax, and (z) registered mail, postage paid, at the
     address of each holder as it may appear on the records of the Partnership
     stating (A) the redemption date, which shall be no later than sixty (60)
     days following the receipt of the Exchange Notice, (B) the redemption
     price, (C) the place or places where the Series G Preferred Units are to be
     surrendered for payment of the redemption price, (D) that distributions on
     the Series G Preferred Units will cease to accrue on such redemption date;
     (E) that payment of the redemption price will be made upon presentation and
     surrender of the Series G Preferred Units and (F) the aggregate number of
     Series G Preferred Units to be redeemed, and if fewer than all of the
     outstanding Series G Preferred Units are to be redeemed, the number of
     Series G Preferred Units to be redeemed held by such holder, which number
     shall equal such holder's pro-rata share (based on the percentage of the
     aggregate number of outstanding Series G Preferred Units the total number
     of Series G Preferred Units held by such holder represents) of the
     aggregate number of Series G Preferred Units being redeemed.

          (iii) In the event an exchange of all or a portion of Series G
     Preferred Units pursuant to Section 8(a)(i) hereof would violate the
     provisions on ownership limitation of the General Partner set forth in
     Article 3 of the Charter with respect to the Series G Preferred Shares, the
     General Partner shall give written notice thereof to each holder of record
     of Series G Preferred Units, within ten (10) Business Days following
     receipt of the Exchange Notice, by (y) fax, and (z) registered mail,
     postage prepaid, at the address of each such holder set forth in the
     records of the Partnership. In such event, each holder of Series G
     Preferred Units shall be entitled to exchange, pursuant to the provision of
     Section 8(b) a number of Series G Preferred Units which would comply with
     the provisions on the ownership limitation of the General Partner set forth
     in such Article 3 of the Charter and any Series G Preferred Units not so
     exchanged (the "Excess Units") shall be redeemed by the Partnership for
                     ------------
     cash in an amount equal to the original Capital Contribution per Excess
     Unit, plus any accrued and unpaid distributions thereon, whether or not
     declared, to the date of

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<PAGE>

     redemption. The written notice of the General Partner shall state (A) the
     number of Excess Units held by such holder, (B) the redemption price of the
     Excess Units, (C) the date on which such Excess Units shall be redeemed,
     which date shall be no later than sixty (60) days following the receipt of
     the Exchange Notice, (D) the place or places where such Excess Units are to
     be surrendered for payment of the Redemption Price, (E) that distributions
     on the Excess Units will cease to accrue on such redemption date, and (F)
     that payment of the redemption price will be made upon presentation and
     surrender of such Excess Units. In the event an exchange would result in
     Excess Units, as a condition to such exchange, each holder of such units
     agrees to provide representations and covenants reasonably requested by the
     General Partner relating to (1) the widely held nature of the interests in
     such holder, sufficient to assure the General Partner that the holder's
     ownership of stock of the General Partner (without regard to the limits
     described above) will not cause any individual to Beneficially Own in
     excess of the Ownership Limit (all as defined in the General Partner's
     Charter); and (2) to the extent such holder can so represent and covenant
     without obtaining information from its owners, the holder's ownership of
     tenants of the Partnership and its affiliates.

          (iv) The redemption of Series G Preferred Units described in Section
     8(a)(ii) and (iii) shall be subject to the provisions of Sections 5(b) and
     5(c)(ii); provided, however, that the term "Redemption Price" in such
               --------  -------
     section shall be read to mean the original Capital Contribution per Series
     G Preferred Unit being redeemed plus all accrued and unpaid distributions
     to the redemption date.

          (b) Procedure for Exchange.
              ----------------------

          (i) Any exchange pursuant to this Amendment shall be exercised
     pursuant to a notice of exchange (the "Exchange Notice") delivered to the
                                            ---------------
     General Partner by the holder who is exercising such exchange right, by (A)
     fax and (B) by certified mail postage prepaid. The exchange of Series G
     Preferred Units, or a specified portion thereof, may be effected after the
     fifth (5th) Business Day following receipt by the General Partner of the
     Exchange Notice by delivering certificates, if any, representing such
     Series G Preferred Units to be exchanged together with, if applicable,
     written notice of exchange and a proper assignment of such Series G
     Preferred Units to the office of the General Partner maintained for such
     purpose. Currently, such office is Two Center Plaza, Suite 200, Boston,
     Massachusetts 02108. Each exchange will be deemed to have been effected
     immediately prior to the close of business on the date on which such Series
     G Preferred Units to be exchanged (together with all required
     documentation) shall have been surrendered and notice shall have been
     received by the General Partner as aforesaid and the Exchange Price shall
     have been paid. Any Series G Preferred Shares issued pursuant to this
     Section 8 shall be delivered as shares which are duly authorized, validly
     issued, fully paid and nonassessable, free of pledge, lien, encumbrance or
     restriction other than those provided in the Charter, the Bylaws of the
     General Partner, the Securities Act of 1933 and relevant state securities
     or blue sky laws.

                                      10
<PAGE>

          (ii) In the event of an exchange of Series G Preferred Units for
     Series G Preferred Shares, an amount equal to the accrued and unpaid
     distributions, whether or not declared, to the date of exchange on any
     Series G Preferred Units tendered for exchange shall (A) accrue on the
     Series G Preferred Shares into which such Series G Preferred Units are
     exchanged, and (B) continue to accrue on such Series G Preferred Units,
     which shall remain outstanding following such exchange, with the General
     Partner as the holder of such Series G Preferred Units. Notwithstanding
     anything to the contrary set forth herein, in no event shall a holder of a
     Series G Preferred Unit that was validly exchanged into Series G Preferred
     Shares pursuant to this section (other than the General Partner now holding
     such Series G Preferred Unit), receive a cash distribution out of Available
     Cash of the Partnership, if such holder, after exchange, is entitled to
     receive a distribution out of Available Cash with respect to the Series G
     Preferred Shares for which such Series G Preferred Unit was exchanged or
     redeemed.

          (iii) Fractional shares of Series G Preferred Shares are not to be
     issued upon exchange but, in lieu thereof, the General Partner will pay a
     cash adjustment based upon the fair market value of the Series G Preferred
     Shares on the day prior to the exchange date as determined in good faith by
     the Board of Directors of the General Partner.

          (c) Adjustment of Exchange Price.
              ----------------------------

          (i) The Exchange Price is subject to adjustment upon certain events,
     including (a) subdivisions, combinations and reclassifications of the
     Series G Preferred Shares and (b) distributions to all holders of Series G
     Preferred Shares of evidences of indebtedness of the General Partner or
     assets (including securities but excluding dividends and distributions paid
     out of equity applicable to Series G Preferred Shares).

          (ii) In case the General Partner shall be a party to any transaction
     (including, without limitation, a merger, consolidation, statutory share
     exchange, tender offer for all or substantially all of the General
     Partner's capital stock or sale of all or substantially all of the General
     Partner's assets), in each case as a result of which the Series G Preferred
     Shares will be converted into the right to receive shares of capital stock,
     other securities or other property (including cash or any combination
     thereof), each Series G Preferred Unit will thereafter be exchangeable into
     the kind and amount of shares of capital stock and other securities and
     property receivable (including cash or any combination thereof) upon the
     consummation of such transaction by a holder of that number of Series G
     Preferred Shares or fraction thereof into which one Series G Preferred Unit
     was exchangeable immediately prior to such transaction. The General Partner
     may not become a party to any such transaction unless the terms thereof are
     consistent with the foregoing.

                                      11
<PAGE>

     Section 9. No Conversion Rights. (a) The holders of the Series G Preferred
                --------------------
Units shall not have any rights to convert such Partnership Units into any other
class of Partnership Interests or any interest in the Partnership;

     (b) The Series G Preferred Units shall not be subject to the provisions of
Section 4.2(e) of the Partnership Agreement.

     Section 10. No Sinking Fund. No sinking fund shall be established for the
                 ---------------
retirement or redemption of the Series G Preferred Units.

     Section 11. Admission of Limited Partner; Exhibits to Partnership
                 -----------------------------------------------------
Agreement. In accordance with Section 12.2(b), Contributor is hereby admitted as
---------
an Additional Limited Partner. In order to duly reflect the issuance of Series G
Preferred Units provided for herein, the Partnership Agreement will be amended
by deleting Exhibit A attached thereto and substituting Exhibit A attached
                                                        ---------
hereto therefor.

     Section 12. Reaffirmation. Except as modified herein, all terms and
                 -------------
conditions of the Partnership Agreement shall remain in full force and effect,
which terms and conditions the General Partner hereby ratifies and affirms.

                                      12
<PAGE>

IN WITNESS WHEREOF, this Amendment has been executed as of the date first above
written.

                                            CABOT INDUSTRIAL TRUST

                                            By: /s/ Neil Waisnor
                                                ------------------------------
                                            Name: Neil Waisnor
                                            Title:  Senior Vice President

                    ***Signatures Continued On Next Page***
<PAGE>

                                  J.P. MORGAN EMERGING TECHNOLOGY
                                  EXCHANGE FUND, LLC

                                  By: J.P. Morgan Private Investments Inc., as
                                      manager of J.P. Morgan Emerging Technology
                                      Exchange Fund, LLC

                                  By: /s/ Gerald R. Ronayne
                                      ----------------------------------------
                                            Name: Gerald R. Ronayne
                                            Title: Director
                                      Address:  345 Park Avenue
                                                New York, New York 10154-1002
                                                Attention: Andrew Craighead<PAGE>

                                                                    Exhibit 4.16

                            CABOT INDUSTRIAL TRUST

                            ARTICLES SUPPLEMENTARY

                                600,000 SHARES

            8.875% SERIES G CUMULATIVE REDEEMABLE PREFERRED SHARES

     Cabot Industrial Trust, a Maryland real estate investment trust (the
"Company"), hereby certifies to the State Department of Assessments and Taxation
 -------
of Maryland (the "SDAT") that:
                  ----

          FIRST: Under a power contained in Article 2, Section 1 of the Amended
          -----
and Restated Declaration of Trust of the Company, filed with, and accepted for
record by, the SDAT on January 28, 1998, as supplemented by Articles
Supplementary filed with, and accepted for record by, the SDAT, respectively, on
July 10, 1998, on April 29, 1999, on September 3, 1999, on September 27, 1999,
on December 9, 1999, and on December 22, 1999, and as corrected by that certain
Certificate of Correction filed with, and accepted for record by, the SDAT on
October 12, 1999 (as supplemented and corrected, the "Charter"), the Board of
                                                      -------
Trustees of the Company, as required by Section 8-203(b) of the Corporations and
Associations Article of the Annotated Code of Maryland, has unanimously adopted
resolutions classifying and designating 600,000 unissued shares of beneficial
interest as 8.875% Series G Cumulative Redeemable Preferred Shares, par value
$0.01 per share, with the following preferences, conversion and other rights,
voting powers, restrictions, limitations as to dividends and other
distributions, qualifications and terms and conditions of redemption, and other
terms and conditions, which upon any restatement of the Charter shall be made
part of Article 2 of the Charter, with any necessary or appropriate changes to
the enumeration and lettering thereof.

          SECOND: The following is a description of the 8.875% Series G
          ------
Cumulative Redeemable Preferred Shares, including the preferences, conversion
and other rights, voting powers, restrictions, limitations as to dividends,
qualifications, and terms and conditions of redemption thereof:

             8.875% SERIES G CUMULATIVE REDEEMABLE PREFERRED SHARES

     SECTION 1. Designation and Number. A series of preferred shares, designated
                ----------------------
the "8.875% Series G Cumulative Redeemable Preferred Shares" (the "Series G
                                                                   --------
Preferred Shares") is hereby established. The number of shares of Series G
----------------
Preferred Shares shall be 600,000, par value $0.01 per share.

     SECTION 2. Rank. The Series G Preferred Shares shall, with respect to
                ----
distributions and rights upon voluntary or involuntary liquidation, winding-up
or dissolution of the Company, rank senior to all classes or series of common
shares and to all classes or series of equity securities of the Company now or
hereafter authorized, issued or outstanding, other than any class or series of
equity securities of the Company expressly designated as ranking on a parity
with or senior to the Series G Preferred Shares as to distributions and rights
upon voluntary or involuntary liquidation, winding-up or dissolution of the
Company. For purposes of these Articles Supplementary, the term "Parity
                                                                 ------
Preferred Shares" shall be used to refer to any class or series of equity
----------------
securities of the Company now or hereafter authorized, issued or outstanding
expressly designated by the Company to rank on a parity with the Series G
Preferred Shares with respect to distributions and rights upon voluntary or
involuntary liquidation, winding-up or dissolution of the Company, including
specifically the Series B Cumulative Redeemable Preferred Shares, the Series C
Cumulative Redeemable Preferred Shares, the Series D Cumulative Redeemable
Preferred Shares, the Series E Cumulative Redeemable Preferred Shares and the
Series F Cumulative Redeemable Preferred Shares. The term "equity securities"
does not include debt securities, which will rank senior to the Series G
Preferred Shares.
<PAGE>

          SECTION 3.    Distributions.
                        -------------

          (a) Payment of Distributions. Subject to the rights of holders of
              ------------------------
Parity Preferred Shares and holders of equity securities ranking senior to the
Series G Preferred Shares as to payment of distributions, holders of Series G
Preferred Shares will be entitled to receive, when, as and if declared by the
Board of Trustees of the Company, out of funds legally available for the payment
of distributions, cumulative preferential cash distributions at the rate per
annum of 8.875% of the $25 liquidation preference per Series G Preferred Share.
Such distributions shall be cumulative, shall accrue from the original date of
issuance and will be payable (i) quarterly in arrears, on March 25, June 25,
September 25 and December 25 of each year commencing on the first of such dates
to occur after the original date of issuance and, (ii) in the event of a
redemption, on the redemption date (each a "Preferred Shares Distribution
                                            -----------------------------
Payment Date"). The amount of the distribution payable for any period will be
------------
computed on the basis of a 360-day year of twelve 30-day months and for any
period shorter than a full quarterly period for which distributions are
computed, the amount of the distribution payable will be computed on the basis
of the actual number of days elapsed in such period. If any date on which
distributions are to be made on the Series G Preferred Shares is not a Business
Day (as defined herein), then payment of the distribution to be made on such
date will be made on the next succeeding day that is a Business Day (and without
any interest or other payment in respect of any such delay) except that, if such
Business Day is in the next succeeding calendar year, such payment shall be made
on the immediately preceding Business Day, in each case with the same force and
effect as if made on such date. Distributions on the Series G Preferred Shares
will be made to the holders of record of the Series G Preferred Shares on the
relevant record dates, which, unless otherwise provided by the Company with
respect to any distribution, will be fifteen (15) Business Days prior to the
relevant Preferred Shares Distribution Payment Date (each a "Distribution Record
                                                             -------------------
Date"). Notwithstanding anything to the contrary set forth herein, each Series G
----
Preferred Share shall also continue to accrue all accrued and unpaid
distributions up to the exchange date on any Series G Preferred Unit (as defined
in the Second Amended and Restated Agreement of Limited Partnership of Cabot
Industrial Properties, L.P., dated as of February 4, 1998 (as amended through
the date hereof, the "Partnership Agreement") validly exchanged into such Series
                      ---------------------
G Preferred Share in accordance with the provisions of such Partnership
Agreement.

          The term "Business Day" shall mean each day, other than a Saturday or
                    ------------
a Sunday, which is not a day on which banking institutions in New York, New York
are authorized or required by law, regulation or executive order to close.

          (b) Limitation on Distributions. No distributions on the Series G
              ---------------------------
Preferred Shares shall be declared or paid or set apart for payment by the
Company at such time as the terms and provisions of any agreement of the
Company, including any agreement relating to its indebtedness, prohibits such
declaration, payment or setting apart for payment or provides that such
declaration, payment or setting apart for payment would constitute a breach
thereof or a default thereunder, or if such declaration, payment or setting
apart for payment shall be restricted or prohibited by law.

          (c) Distributions Cumulative. Notwithstanding the foregoing,
              ------------------------
distributions on the Series G Preferred Shares will accrue whether or not the
terms and provisions set forth in Section 3(b) hereof at any time prohibit the
current payment of distributions, whether or not the Company has earnings,
whether or not there are funds legally available for the payment of such
distributions and whether or not such distributions are authorized or declared.
Accrued but unpaid distributions on the Series G Preferred Shares will
accumulate as of the Preferred Shares Distribution Payment Date on which they
first become payable. Accumulated and unpaid distributions will not bear
interest.

          (d) Priority as to Distributions. (i) So long as any Series G
              ----------------------------
Preferred Shares are outstanding, no distribution of cash or other property
shall be authorized, declared, paid or set apart for payment on or with respect
to any class or series of common shares or any class or series of other Shares
of the Company ranking junior as to the payment of distributions or rights upon
voluntary or involuntary dissolution, liquidation or winding up of the Company
to the Series G Preferred Shares (such common shares or other junior Shares,
including, without limitation Series A Junior Participating Preferred Shares
authorized pursuant to Articles Supplementary filed with the SDAT on July 10,
1998, collectively, "Junior Shares"), nor shall any cash or other property be
                     -------------
set aside for or

                                       2
<PAGE>

applied to the purchase, redemption or other acquisition for consideration of
any Series G Preferred Shares, any Parity Preferred Shares or any Junior Shares,
unless, in each case, all distributions accumulated on all Series G Preferred
Shares and all classes and series of outstanding Parity Preferred Shares have
been paid in full. The foregoing sentence will not prohibit (i) distributions
payable solely in Shares of the Company ranking junior to the Series G Preferred
Shares as to distributions and upon liquidation, winding-up or dissolution, (ii)
the conversion of Junior Shares or Parity Preferred Shares into Shares of the
Company ranking junior to the Series G Preferred Shares as to distributions and
upon liquidation, winding up or dissolution, and (iii) purchase by the Company
of such Series G Preferred Shares, Parity Preferred Shares or Junior Shares
pursuant to Article 3 of the Charter to the extent required to preserve the
Company's status as a real estate investment trust.

               (ii)    So long as distributions have not been paid in full (or a
sum sufficient for such full payment is not irrevocably deposited in trust for
payment) upon the Series G Preferred Shares, all distributions authorized and
declared on the Series G Preferred Shares and all classes or series of
outstanding Parity Preferred Shares shall be authorized and declared so that the
amount of distributions authorized and declared per share of Series G Preferred
Shares and such other classes or series of Parity Preferred Shares shall in all
cases bear to each other the same ratio that accrued distributions per share on
the Series G Preferred Shares and such other classes or series of Parity
Preferred Shares (which shall not include any accumulation in respect of unpaid
distributions for prior distribution periods if such class or series of Parity
Preferred Shares do not have cumulative distribution rights) bear to each other.

     (e)       No Further Rights. Holders of Series G Preferred Shares shall not
               -----------------
be entitled to any distributions, whether payable in cash, other property or
otherwise, in excess of the full cumulative distributions described herein.

     SECTION 4.    Liquidation Preference.
                   ----------------------

     (a)       Payment of Liquidating Distributions. Subject to the rights of
               ------------------------------------
holders of Parity Preferred Shares and subject to equity securities ranking
senior to the Series G Preferred Shares with respect to rights upon any
voluntary or involuntary liquidation, dissolution or winding-up of the Company,
the holders of Series G Preferred Shares shall be entitled to receive out of the
assets of the Company legally available for distribution or the proceeds
thereof, after payment or provision for debts and other liabilities of the
Company, but before any payment or distributions of the assets shall be made to
holders of common shares or any other class or series of shares of the Company
that ranks junior to the Series G Preferred Shares as to rights upon
liquidation, dissolution or winding-up of the Company, an amount equal to the
sum of (i) a liquidation preference of $25 per Series G Preferred Share, and
(ii) an amount equal to any accumulated and unpaid distributions thereon,
whether or not declared, to the date of payment. In the event that, upon such
voluntary or involuntary liquidation, dissolution or winding-up, there are
insufficient assets to permit full payment of liquidating distributions to the
holders of Series G Preferred Shares and any Parity Preferred Shares, all
payments of liquidating distributions on the Series G Preferred Shares and such
Parity Preferred Shares shall be made so that the payments on the Series G
Preferred Shares and such Parity Preferred Shares shall in all cases bear to
each other the same ratio that the respective rights of the Series G Preferred
Shares and such other Parity Preferred Shares (which shall not include any
accumulation in respect of unpaid distributions for prior distribution periods
if such Parity Preferred Shares do not have cumulative distribution rights) upon
liquidation, dissolution or winding-up of the Company bear to each other.

     (b)       Notice. Written notice of any such voluntary or involuntary
               ------
liquidation, dissolution or winding-up of the Company, stating the payment date
or dates when, and the place or places where, the amounts distributable in such
circumstances shall be payable, shall be given by (i) fax and (ii) by registered
mail, postage pre-paid, not less than thirty (30) and not more than sixty (60)
days prior to the payment date stated therein, to each record holder of the
Series G Preferred Shares at the respective addresses of such holders as the
same shall appear on the share transfer records of the Company.

     (c)       No Further Rights. After payment of the full amount of the
               -----------------
liquidating distributions to which they are entitled, the holders of Series G
Preferred Shares will have no right or claim to any of the remaining assets of
the Company.

                                       3
<PAGE>

     (d)       Consolidation, Merger or Certain Other Transactions. The
               ---------------------------------------------------
voluntary sale, conveyance, lease, exchange or transfer (for cash, shares of
stock, securities or other consideration) of all or substantially all of the
property or assets of the Company to, or the consolidation or merger or other
business combination of the Company with or into any corporation, trust or other
entity (or of any corporation, trust or other entity with or into the Company)
shall not be deemed to constitute a liquidation, dissolution or winding-up of
the Company.

     SECTION 5.    Optional Redemption.
                   -------------------

     (a)      Right of Optional Redemption. The Series G Preferred Shares may
              ----------------------------
not be redeemed prior to March 23, 2005. On or after such date, the Company
shall have the right to redeem the Series G Preferred Shares, in whole or in
part, at any time or from time to time, upon not less than thirty (30) nor more
than sixty (60) days' written notice, at a redemption price, payable in cash,
equal to $25 per share of Series G Preferred Shares plus accumulated and unpaid
distributions, whether or not declared, to the date of redemption. If fewer than
all of the outstanding Series G Preferred Shares are to be redeemed, the Series
G Preferred Shares to be redeemed shall be selected pro rata (as nearly as
practicable without creating fractional shares).

     (b)      Limitation on Redemption. The Company may not redeem fewer than
              ------------------------
all of the outstanding shares of Series G Preferred Shares unless all
accumulated and unpaid distributions have been paid on all outstanding Series G
Preferred Shares for all quarterly distribution periods terminating on or prior
to the date of redemption.

     (c)      Procedures for Redemption. (i) Notice of redemption will be (i)
              -------------------------
faxed, and (ii) mailed by the Company by registered mail, postage prepaid, not
less than thirty (30) nor more than sixty (60) days prior to the redemption
date, addressed to the respective holders of record of the Series G Preferred
Shares to be redeemed at their respective addresses as they appear on the
transfer records of the Company. No failure to give or defect in such notice
shall affect the validity of the proceedings for the redemption of any Series G
Preferred Shares except as to the holder to whom such notice was defective or
not given. In addition to any information required by law or by the applicable
rules of any exchange upon which the Series G Preferred Shares may be listed or
admitted to trading, each such notice shall state: (i) the redemption date, (ii)
the redemption price, (iii) the number of Series G Preferred Shares to be
redeemed, (iv) the place or places where such Series G Preferred Shares are to
be surrendered for payment of the redemption price, (v) that distributions on
the Series G Preferred Shares to be redeemed will cease to accumulate on such
redemption date and (vi) that payment of the redemption price and any
accumulated and unpaid distributions will be made upon presentation and
surrender of such Series G Preferred Shares. If fewer than all of the Series G
Preferred Shares held by any holder are to be redeemed, the notice mailed to
such holder shall also specify the number of Series G Preferred Shares held by
such holder to be redeemed.

              (ii) If the Company gives a notice of redemption in respect of
Series G Preferred Shares (which notice will be irrevocable) then, by 12:00
noon, New York City time, on the redemption date, the Company will deposit
irrevocably in trust for the benefit of the holders of the Series G Preferred
Shares being redeemed, funds sufficient to pay the applicable redemption price,
plus any accumulated and unpaid distributions, whether or not declared, if any,
on such shares to the date fixed for redemption, without interest, and will give
irrevocable instructions and authority to pay such redemption price and any
accumulated and unpaid distributions, whether or not declared, if any, on such
shares to the holders of the Series G Preferred Shares upon surrender of the
certificates for the Series G Preferred Shares by such holders at the place
designated in the notice of redemption. If fewer than all Series G Preferred
Shares evidenced by any certificate are being redeemed, a new certificate shall
be issued upon surrender of the certificate evidencing all Series G Preferred
Shares, evidencing the unredeemed Series G Preferred Shares without cost to the
holder thereof. On and after the date of redemption, distributions will cease to
accumulate on the Series G Preferred Shares or portions thereof called for
redemption, unless the Company defaults in the payment of such redemption price.
If any date fixed for redemption of Series G Preferred Shares is not a Business
Day, then payment of the redemption price payable on such date will be made on
the next succeeding day that is a Business Day (and without any interest or
other payment in respect of any such delay) except that, if such Business Day
falls in the next calendar year, such payment will be made on the immediately
preceding Business Day, in each case with the same force and effect as if made
on such date fixed for redemption. If payment of the redemption price or any
accumulated or unpaid distributions in respect of the Series G Preferred Shares
is

                                       4
<PAGE>

improperly withheld or refused and not paid by the Company, distributions on
such Series G Preferred Shares will continue to accumulate from the original
redemption date to the date of payment, in which case the actual payment date
will be considered the date fixed for redemption for purposes of calculating the
applicable redemption price and any accumulated and unpaid distributions.

     (d)      Status of Redeemed Shares. Any Series G Preferred Shares that
              -------------------------
shall at any time have been redeemed shall after such redemption, have the
status of authorized but unissued Shares, without designation as to class or
series until such shares are once more designated as part of a particular class
or series by the Board.

     SECTION 6.    Voting Rights.
                   -------------

     (a)      General. Holders of the Series G Preferred Shares will not have
              -------
any voting rights, except as set forth below.

     (b)      Right to Elect Trustees. (i) If at any time full distributions
              -----------------------
shall not have been timely made on any Series G Preferred Shares with respect to
any six (6) prior quarterly distribution periods, whether or not consecutive (a
"Preferred Distribution Default"), the holders of such Series G Preferred
 ------------------------------
Shares, voting together as a single class with the holders of each class or
series of Parity Preferred Shares upon which like voting rights have been
conferred and are exercisable, will have the right to elect two additional
Trustees to serve on the Company's Board (the "Preferred Shares Trustees") at a
                                               -------------------------
special meeting called by the holders of record of at least 10% of the
outstanding Series G Preferred Shares or any such class or series of Parity
Preferred Shares or at the next annual meeting of Shareholders, and at each
subsequent annual meeting of Shareholders or special meeting for the election of
Trustees held in place thereof, until all such distributions in arrears and
distributions for the current quarterly period on the Series G Preferred Shares
and each such class or series of Parity Preferred Shares have been paid in full.

          (ii)     At any time when such voting rights shall have vested, a
proper officer of the Company shall call or cause to be called, upon written
request of holders of record of at least 10% of the outstanding Series G
Preferred Shares, a special meeting of the holders of Series G Preferred Shares
and all the series of Parity Preferred Shares upon which like voting rights have
been conferred and are exercisable (collectively, the "Parity Securities") by
                                                       -----------------
mailing or causing to be mailed to such holders a notice of such special meeting
to be held not less than ten and not more than 45 days after the date such
notice is given. The record date for determining holders of the Parity
Securities entitled to notice of and to vote at such special meeting will be the
close of business on the third Business Day preceding the day on which such
notice is mailed. At any such special meeting, all of the holders of the Parity
Securities, by plurality vote, voting together as a single class without regard
to series will be entitled to elect two Trustees on the basis of one vote per
$25 of liquidation preference to which such Parity Securities are entitled by
their terms (excluding amounts in respect of accumulated and unpaid dividends)
and not cumulatively. The holder or holders of one-third of the Parity
Securities then outstanding, present in person or by proxy, will constitute a
quorum for the election of the Preferred Shares Trustees except as otherwise
provided by law. Notice of all meetings at which holders of the Series G
Preferred Shares shall be entitled to vote will be given to such holders at
their addresses as they appear in the transfer records. At any such meeting or
adjournment thereof in the absence of a quorum, subject to the provisions of any
applicable law, the holders of a majority of the votes to which the Parity
Securities are entitled, present in person or by proxy, shall have the power to
adjourn the meeting for the election of the Preferred Shares Trustees, without
notice other than an announcement at the meeting, until a quorum is present. If
a Preferred Distribution Default shall terminate after the notice of a special
meeting has been given but before such special meeting has been held, the
Company shall, as soon as practicable after such termination, mail or cause to
be mailed notice of such termination to holders of the Series G Preferred Shares
that would have been entitled to vote at such special meeting.

          (iii)    If and when all accumulated distributions and the
distributions for the current distribution period on the Series G Preferred
Shares shall have been paid in full or a sum sufficient for such payment is
irrevocably deposited in trust for payment, the holders of the Series G
Preferred Shares shall be divested of the voting rights set forth in this
Section 6(b) herein (subject to revesting in the event of each and every
Preferred Distribution Default) and, if all distributions in arrears and the
distributions for the current distribution period have

                                       5
<PAGE>

been paid in full or set aside for payment in full on all other classes or
series of Parity Preferred Shares upon which like voting rights have been
conferred and are exercisable, the term and office of each Preferred Shares
Trustee so elected shall terminate. Any Preferred Shares Trustee may be removed
at any time with or without cause by the vote of, and shall not be removed
otherwise than by the vote of, the holders of record of a majority of the votes
to which the outstanding Parity Securities are entitled, when they have the
voting rights set forth in this Section 6(b). So long as a Preferred
Distribution Default shall continue, any vacancy in the office of a Preferred
Shares Trustee may be filled by written consent of the Preferred Shares Trustee
remaining in office, or if none remains in office, by a vote of the holders of
record of a majority of the votes to which the outstanding Parity Securities are
entitled, when they have the voting rights set forth in this Section 6(b). The
Preferred Shares Trustees shall each be entitled to one vote per trustee on any
matter.

          (c) Certain Voting Rights. So long as any Series G Preferred Shares
              ---------------------
remain outstanding, the Company shall not, without the approval of the holders
of at least two-thirds of the Series G Preferred Shares outstanding at the time
(i) designate or create, or increase the authorized or issued amount of, any
class or series of shares ranking senior to the Series G Preferred Shares with
respect to payment of distributions or rights upon liquidation, dissolution or
winding-up of the Company or reclassify any authorized shares of the Company
into any such shares, or create, authorize or issue any obligations or security
convertible into or evidencing the right to purchase any such shares, (ii)
designate or create, or increase the authorized or issued amount of, any Parity
Preferred Shares or reclassify any authorized shares of the Company into any
such shares, or create, authorize or issue any obligations or security
convertible into or evidencing the right to purchase any such shares, but only
to the extent such Parity Preferred Shares are issued to an affiliate of the
Company, or (iii) either (A) consolidate, merge into or with, or convey,
transfer or lease its assets substantially as an entirety, to any corporation or
other entity, or (B) amend, alter or repeal the provisions of the Company's
Charter (including these Articles Supplementary) or By-laws, whether by merger,
consolidation or otherwise, in each case that would materially and adversely
affect the powers, special rights, preferences, privileges or voting power of
the Series G Preferred Shares or the holders thereof; provided, however, that
with respect to the occurrence of a merger, consolidation or a sale or lease of
all or substantially all of the Company's assets as an entirety, so long as (a)
the Company is the surviving entity and the Series G Preferred Shares remain
outstanding with the terms thereof unchanged, or (b) the resulting, surviving or
transferee entity is a corporation or real estate investment trust organized
under the laws of any state and substitutes the Series G Preferred Shares for
other preferred Shares having substantially the same terms and same rights as
the Series G Preferred Shares, including with respect to distributions,
redemptions, transfers, voting rights and rights upon liquidation, dissolution
or winding-up of the Company, then the occurrence of any such event shall not be
deemed to materially and adversely affect such rights, privileges or voting
powers of the holders of the Series G Preferred Shares and no vote of the Series
G Preferred Shares shall be required; and provided further that any increase in
the amount of authorized Shares or the creation or issuance of any other class
or series of Shares, or any increase in an amount of authorized shares of each
class or series, in each case ranking either (a) junior to the Series G
Preferred Shares with respect to payment of distributions and the distribution
of assets upon liquidation, dissolution or winding-up of the Company, or (b) on
a parity with the Series G Preferred Shares with respect to payment of
distributions or the distribution of assets upon liquidation, dissolution or
winding-up of the Company to the extent such Shares are not issued to an
affiliate of the Company, shall not be deemed to materially and adversely affect
such rights, preferences, privileges or voting powers and no approval of the
Series G Preferred Shares shall be required.

     SECTION 7.    Transfer Restrictions. The Series G Preferred Shares shall be
                   ---------------------
subject to the provisions of Article 3 of the Charter; provided, however, in no
event shall the Ownership Limit with respect to the Series G Preferred Shares
(as defined in the Charter) be decreased pursuant to Section 10 of Article 3 of
the Charter or otherwise (other than a decrease as a result of a retroactive
change in existing law that would require a decrease to retain real estate
investment trust status under the Internal Revenue Code of 1986, as amended).

     SECTION 8.    No Conversion Rights. The holders of the Series G Preferred
                   --------------------
Shares shall not have any rights to convert such shares into shares of any other
class or series of Shares or into any other securities of, or interest in, the
Company.

     SECTION 9.    No Sinking Fund. No sinking fund shall be established for the
                   ---------------
retirement or redemption

                                       6
<PAGE>

of Series G Preferred Shares.

     SECTION 10.   No Preemptive Rights. No holder of the Series G Preferred
                   --------------------
Shares of the Company shall, as such holder, have any preemptive rights to
purchase or subscribe for additional Shares of the Company or any other security
of the Company which it may issue or sell.

          THIRD: The Series G Preferred Shares have been classified and
          -----
designated by the Board under the authority contained in the Charter.

          FOURTH: These Articles Supplementary have been approved by the Board
          ------
in the manner and by the vote required by law.

          FIFTH: The undersigned President of the Company acknowledges these
          -----
Articles Supplementary to be the corporate act of the Company and, as to all
matters or facts required to be verified under oath, the undersigned President
acknowledges that to the best of his knowledge, information and belief, these
matters and facts are true in all material respects and that this statement is
made under the penalties for perjury.

                                       7
<PAGE>

         IN WITNESS WHEREOF, the Company has caused these Articles Supplementary
to be  executed  under seal in its name and on its behalf by its  President  and
attested to by its Secretary on this 23rd day of March, 2000.

                                            CABOT INDUSTRIAL TRUST

                                            By: /s/ Robert E. Patterson
                                                ------------------------------
                                                   Name:   Robert E. Patterson
                                                   Title:  President

[SEAL]

ATTEST:

By: /s/ Neil E. Waisnor
    ----------------------------------
       Name:   Neil E. Waisnor
       Title:  Secretary

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