<PAGE>

                                                                    Exhibit 4.18

                             CABOT INDUSTRIAL TRUST

                             ARTICLES SUPPLEMENTARY

                                1,400,000 SHARES


              8.95% SERIES H 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, on December 22, 1999, and on March 23, 2000, 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
1,400,000 unissued shares of beneficial interest as 8.95% Series H 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 8.95% Series H
          ------
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:

              8.95% SERIES H CUMULATIVE REDEEMABLE PREFERRED SHARES

          SECTION 1. Designation and Number. A series of preferred shares,
                     ----------------------
designated the "8.95% Series H Cumulative Redeemable Preferred Shares" (the
"Series H Preferred Shares") is hereby established. The number of shares of
 -------------------------
Series H Preferred Shares shall be 1,400,000, par value $0.01 per share.

          SECTION 2. Rank. The Series H 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 H 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 H
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, the
Series F Cumulative Redeemable Preferred Shares and the Series G Cumulative
Redeemable Preferred Shares.. The term "equity securities" does not include debt
securities, which will rank senior to the Series H Preferred Shares.
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          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 H Preferred Shares as to payment of distributions, holders of Series H
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 8.95% of the $25 liquidation preference per Series H 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 31, June 30,
September 30 and December 31 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 H 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 H Preferred Shares
will be made to the holders of record of the Series H 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 H
----
Preferred Share shall also continue to accrue all accrued and unpaid
distributions up to the exchange date on any Series H 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
                      ---------------------
H 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 H
              ---------------------------
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. If the terms and
provisions of any agreement of the Company, including any agreement, relating to
its indebtedness, prohibits the declaration, payment or setting apart for
payment of distributions on the Series H Preferred Shares or provides that such
declaration, payment or setting apart for payment would cause a breach thereof
or a default thereunder, or if such declaration, payment or setting apart for
payment shall be restricted or prohibited by law, then 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, Parity Preferred
Shares or any Junior Shares (as hereinafter defined), nor shall any cash or
other property be set aside for or applied to the purchase, redemption, or other
acquisition for consideration of any class or series of common shares, Parity
Preferred Shares or any Junior Shares.

          (c) Distributions Cumulative. Notwithstanding the foregoing,
              ------------------------
distributions on the Series H 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 H 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.

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<PAGE>

          (d) Priority as to Distributions. (i) So long as any Series H
              ----------------------------
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 H 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 applied to the purchase, redemption or other acquisition for
consideration of any Series H Preferred Shares, any Parity Preferred Shares or
any Junior Shares, unless, in each case, all distributions accumulated on all
Series H 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 H 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
H Preferred Shares as to distributions and upon liquidation, winding up or
dissolution, and (iii) purchase by the Company of such Series H 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 H Preferred Shares, all distributions authorized and
declared on the Series H 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 H 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 H 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 H 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 H Preferred Shares with respect to rights upon any voluntary or
involuntary liquidation, dissolution or winding-up of the Company, the holders
of Series H 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 H 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 H 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 H Preferred
Shares and any Parity Preferred Shares, all payments of liquidating
distributions on the Series H Preferred Shares and such Parity Preferred Shares
shall be made so that the payments on the Series H 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 H 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.

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<PAGE>

     (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 H 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 H Preferred
Shares will have no right or claim to any of the remaining assets of the
Company.

     (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 H Preferred Shares may not be
         ----------------------------
redeemed prior to May 25, 2005. On or after such date, the Company shall have
the right to redeem the Series H 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 H Preferred Shares plus accumulated and unpaid
distributions, whether or not declared, to the date of redemption. If fewer than
all of the outstanding Series H Preferred Shares are to be redeemed, the Series
H 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 H Preferred Shares unless all accumulated and
unpaid distributions have been paid on all outstanding Series H 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 H 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 H 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 H 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 H Preferred Shares to be redeemed,
(iv) the place or places where such Series H Preferred Shares are to be
surrendered for payment of the redemption price, (v) that distributions on the
Series H 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 H Preferred Shares. If fewer than all of the Series H
Preferred Shares held by any holder are to be redeemed, the notice mailed to
such holder shall also specify the number of Series H Preferred Shares held by
such holder to be redeemed.

          (ii) If the Company gives a notice of redemption in respect of Series
H 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 H 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 H Preferred Shares upon surrender of the
certificates

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<PAGE>

for the Series H Preferred Shares by such holders at the place designated in the
notice of redemption. If fewer than all Series H Preferred Shares evidenced by
any certificate are being redeemed, a new certificate shall be issued upon
surrender of the certificate evidencing all Series H Preferred Shares,
evidencing the unredeemed Series H Preferred Shares without cost to the holder
thereof. On and after the date of redemption, distributions will cease to
accumulate on the Series H 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 H 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 H Preferred Shares
is improperly withheld or refused and not paid by the Company, distributions on
such Series H 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 H 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 H Preferred Shares will not have any
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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 H 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 H 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 H 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 H 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 H Preferred Shares,
a special meeting of the holders of Series H 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 H 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

                                       5
<PAGE>

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 H 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 H 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 H 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 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 H Preferred Shares remain
         ---------------------
outstanding, the Company shall not, without the approval of the holders of at
least two-thirds of the Series H 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 H 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 H 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 H 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 H Preferred Shares for
other preferred Shares having substantially the same terms and same rights as
the Series H 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 H Preferred Shares and no approval of the
Series H 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 H 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 H 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 H Preferred Shares shall be required.

                                       6
<PAGE>

     SECTION 7. Transfer Restrictions. The Series H 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 H 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 H 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 of Series H Preferred Shares.

     SECTION 10. No Preemptive Rights. No holder of the Series H 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 H Preferred Shares have been classified and
          -----
designated by the Board of Trustees under the authority contained in the
Charter.

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

          FIFTH: The undersigned President of the Company acknowledges these
          -----
Articles Supplementary to be the trust 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 Assistant Secretary on this 25th day of May, 2000.

                                         CABOT INDUSTRIAL TRUST



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


[SEAL]

ATTEST:



By: /s/ Andrew Klouse
   --------------------------------------
        Name:  Andrew Klouse
        Title: Assistant Secretary