Document:

<PAGE>   1
                                                                   Exhibit 10.24

                    SEPARATION AGREEMENT AND GENERAL RELEASE
                    ----------------------------------------

1.       I, JOHN A. REDMOND ("Employee"), accept the termination of my
         employment from Gliatech Inc. ("Gliatech") effective JANUARY 12, 2000
         (the "Separation Date"), in accordance with the terms of this
         Separation Agreement and General Release ("Agreement"). In accepting
         the consideration and promise stated in Paragraphs 2 and 9 below,
         Employee hereby releases Gliatech and each of its successors, assigns,
         shareholders, officers, directors, employees, agents and counsel from
         any and all actions, suits, claims and demands of any kind other than
         any claims arising under a breach of this agreement, in law or equity,
         that Employee ever had or now has, by reason of any event, claim,
         matter, cause or thing, and particularly any claim relating in any way
         to Employee's employment or the termination of Employee's employment
         with Gliatech, including without limitation any claim under the Age
         Discrimination in Employment Act, any claim arising under any federal,
         state, or local law, and any claim under common law.

2.       In full consideration of Employee signing this Agreement and the
         covenants contained herein, Gliatech agrees to the following:

             A.    Employee shall be paid a total of TWO HUNDRED THOUSAND
                   DOLLARS ($200,000.00) (representing ONE 1 YEAR of
                   severance pay) (the "Severance Amount"), less all applicable
                   withholding taxes, payable in a lump sum on or before
                   January 15, 2000.

             B.    Employee shall be paid for credited but unused vacation time
                   determined as of the Separation Date, with such payment to be
                   made within thirty days of the Separation Date.

             C.    Employee shall be entitled to continuation of medical and
                   dental coverage at Employee's present level of benefits as
                   provided under COBRA. Accordingly, for a period of THREE
                   months from the Separation Date, Gliatech will continue to
                   pay Employee's full premium for such coverage.

              D.   Gliatech will provide Employee with an employee outplacement
                   service with Drake Beam Morin for a period of SIX months
                   following the Separation Date.

3.       Gliatech's obligations hereunder shall terminate in the event Employee
         breaches any of Employee's obligations under this Agreement.
<PAGE>   2

4.       Employee agrees that Employee will maintain the confidentiality of
         confidential information Employee has received by virtue of Employee's
         employment with Gliatech and will not use such information or disclose
         it to any person other than Gliatech. For purposes of this Agreement,
         confidential information is information which Gliatech endeavors to
         keep proprietary, including without limitation customer lists, employee
         lists, rate schedules, underwriting information, the terms of contracts
         and policies, marketing plans, program designs, trade secrets,
         proprietary information, and any information provided by a third-party
         to Gliatech in confidence. Employee agrees that, upon Employee's
         separation, Employee will return to Gliatech any records in Employee's
         possession containing confidential information of Gliatech and all
         records which are the property of Gliatech.

5.       Employee acknowledges that the consideration set forth in Paragraphs 2
         and 9 is solely in exchange for the promises in this Agreement and is
         an amount in excess of any amount to which he is entitled under any
         law, regulation or company policy, procedure or practice. Employee
         further acknowledges that such payment does not constitute an admission
         by Gliatech or the other released parties of liability or of violation
         of any applicable law or regulation, all of whom deny any liability or
         alleged violation and state that payment has been made solely for the
         purpose of compromising any and all actual or potential claims of
         Employee.

6.       Employee may revoke and cancel this Agreement in writing at any time
         within seven days after Employee's execution of this Agreement by
         providing notice of revocation to GLIATECH INC., ATTENTION: MONICA
         THAYER, AT 23420 COMMERCE PARK ROAD, BEACHWOOD, OH 44122. For
         revocation to be effective, written notice must be received by
         REGISTERED MAIL no later than the close of business on the seventh day
         after Employee signs this Agreement. If Employee does so revoke, this
         Agreement will be null and void and Gliatech shall have no obligation
         to make the payments or to undertake the obligations provided in
         Paragraphs 2 and 9. This Agreement shall not become effective and
         enforceable until after the expiration of the seven-day revocation
         period; after such time, if there has been no revocation, this
         Agreement shall be fully effective and enforceable.

7.       Employee agrees that he has had the opportunity to consult counsel,
         that no deadline of less than 21-days has been imposed upon him to
         execute this Agreement, and that Employee has had time to read and
         consider this Agreement before signing it.

8.       Employee has read and understands all of the terms of this Agreement
         and signs this Agreement in exchange for the consideration to be given
         to Employee. Neither Gliatech nor any of its agents, representatives or
         employees has made any representations to Employee concerning the terms
         or effects of this Agreement other than those contained in this
         Agreement.

9.       Employee has been granted two stock options dated FEBRUARY 22, 1999 and
         OCTOBER 13, 1999. Employee will be entitled to exercise any options
         that have vested or would have vested through OCTOBER 13, 2000 pursuant
         to these grants. Employee

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         will have 180 days after the Separation Date to exercise these options.
         Any and all options not exercised within 180 days after the Separation
         Date will be forfeited.

10.      This Agreement shall be governed and interpreted in accordance with the
         laws of the State of Ohio. Gliatech has taken or will take all
         necessary corporate action with respect to the performance of its
         obligations hereunder.

11.      Gliatech shall issue the press release attached as Exhibit A and shall
         not make or issue any announcements or press releases contrary to that
         press release. Gliatech shall provide a reference for employee that is
         consistent with the attached press release. Gliatech and Employee each
         agree that they will not disparage to any person any aspcet of his or
         its past relationship with the other.

IN WITNESS WHEREOF, the parties have executed this Agreement this 12th day of
January, 2000.

/s/John A. Redmond
_________________________________

/s/Monica M. Thayer
_________________________________
Witness

Gliatech Inc.

By: Thomas O. Oesterling, Ph.D.
    _____________________________

Title: Chairman of the Board & CEO
       __________________________

/s/Jodi Baldi
_________________________________
Witness<PAGE>   1

                                                                   EXHIBIT 10.14

THIS NOTE HAS BEEN ACQUIRED FOR INVESTMENT PURPOSES ONLY AND MAY NOT BE
TRANSFERRED UNTIL (I) A REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933,
AS AMENDED (THE "ACT") SHALL HAVE BECOME EFFECTIVE WITH RESPECT THERETO OR (II)
THE ISSUER SHALL HAVE RECEIVED AN OPINION OF COUNSEL OR OTHER EVIDENCE
REASONABLY SATISFACTORY TO THE ISSUER TO THE EFFECT THAT REGISTRATION UNDER THE
ACT IS NOT REQUIRED IN CONNECTION WITH SUCH PROPOSED TRANSFER NOR IS SUCH
TRANSFER IN VIOLATION OF ANY APPLICABLE STATE SECURITIES LAWS. THIS LEGEND SHALL
BE ENDORSED UPON ANY NOTE ISSUED IN EXCHANGE FOR THIS NOTE. THIS NOTE IS SUBJECT
TO FURTHER RESTRICTIONS ON TRANSFER SET FORTH HEREIN.

THIS CONVERTIBLE SUBORDINATED NOTE AND THE INDEBTEDNESS EVIDENCED HEREBY, AND
THE EXERCISE OF RIGHTS AND REMEDIES HEREUNDER, ARE SUBORDINATE IN THE MANNER AND
TO THE EXTENT SET FORTH IN THIS NOTE.

                         AMERICAN STONE INDUSTRIES, INC.

                       8.00% CONVERTIBLE SUBORDINATED NOTE

                               DUE OCTOBER 1, 2002

DATE OF ISSUANCE:  SEPTEMBER 23, 1999                                   $150,000

         AMERICAN STONE INDUSTRIES, INC., a Delaware corporation (the
"Company"), for value received, hereby promises to pay to ROULSTON VENTURES
LIMITED PARTNERSHIP (the "Payee") on October 1, 2002 (the "Maturity Date") at
the principal office of the Company, 8705 Quarry Road, Amherst, Ohio 44001, the
principal amount of One-Hundred and Fifty Thousand Dollars ($150,000), which
shall be payable in cash or by check on the terms set forth herein. Simple
interest on the principal amount of this Note shall be paid at the rate of eight
percent (8.00%) per annum accrued through the Maturity Date, and payable in cash
or by check quarterly in arrears commencing October 1, 1999 and each January 1,
April 1, July 1 and October 1 thereafter. The principal amount of this Note and
all interest accrued hereon shall be payable on the Maturity Date.

         The Payee hereby irrevocably subscribes for and agrees to purchase this
Note and agrees to transfer on the date hereof to an account specified by the
Company immediately available funds in the principal amount of this Note.

         1. CONVERSION INTO SHARES OF COMMON STOCK. The Payee shall be entitled,
at his option, at any time on or before the close of business on the Maturity
Date to convert this Note (or any portion of the principal amount hereof that is
$1,000 or an integral multiple thereof), at the principal amount hereof, or of
such portion, into fully paid and non-assessable shares (calculated as to each
conversion to the nearest 1/100th of a share) of Common Stock, par value $.001
per share (the "Common Stock") of the Company at a conversion price equal to
$5.50 principal amount for each share of Common Stock (or at the current
adjusted conversion price if an adjustment has been made as provided in the
following paragraph) (the "Conversion Price") by surrender of this Note, duly
endorsed or assigned to the Company or in blank, to the Company at its office,
accompanied by written notice to the Company in the form provided in

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this Note (or such other notice as is acceptable to the Company) that the Payee
elects to convert this Note, or if less than the entire principal amount hereof
is to be converted, the portion hereof to be converted. No fractional shares of
Common Stock will be issued on conversion, but instead of any fractional share,
the Company shall pay a cash adjustment in an amount equal to the Conversion
Price.

         2. ADJUSTMENT OF CONVERSION PRICE. The Conversion Price shall be
equitably adjusted upon the occurrence on or before the Maturity Date of (i) the
issuance of additional shares of Common Stock as a stock dividend or other
distribution on outstanding shares of Common Stock, (ii) a subdivision of
outstanding shares of Common Stock into a greater number of shares of Common
Stock, or (iii) a combination or reverse stock split of outstanding shares of
Common Stock into a smaller number of shares of Common Stock. The Conversion
Price as so adjusted, shall be readjusted in the same manner upon the happening
of any successive stock dividend, stock split or similar event on or before the
Maturity Date.

         3. CHANGE IN CONTROL. Upon any Change in Control (as hereinafter
defined) that occurs before the Maturity Date, the Company, or any different
entity which is the surviving entity in any transaction that constitutes a
Change in Control, shall repay to the Payee (the "Contingent Repayment") the
entire principal amount of this Note, together with interest due thereon through
and including the effective date of such Change in Control (the "Change in
Control Date"). The Company (or such entity) shall make the Contingent Repayment
to the Payee in immediately available funds on the Change in Control Date, and
the Payee shall transmit and surrender the original of this Note to the Company
thereupon for cancellation. Notwithstanding the foregoing, upon a Change in
Control, the Payee shall have the right, at its option, to convert this Note
pursuant to the terms of Paragraph 1 above, in lieu of its right to receive the
Contingent Repayment.

         For the purposes of this Note, a "Change in Control" shall mean the
occurrence at any time before the Maturity Date of any of the following events:

                  (a) The Company is merged or consolidated or reorganized
into or with another corporation or other legal person or entity (other than the
Payee or any affiliate of the Payee), and as a result of such merger,
consolidation or reorganization, less than a majority of the combined voting
power of the then-outstanding securities of such corporation, person or entity
immediately after such transaction are held in the aggregate by the holders of
the then-outstanding securities entitled to vote generally in the election of
the Company's directors ("Voting Stock") immediately prior to such transaction;

                  (b) The Company sells or otherwise transfers all or
substantially all of its assets to any other corporation or other legal person
or entity (other than the Payee or any affiliate of the Payee), and less than a
majority of the combined voting power of the then-outstanding securities of such
acquiring corporation, person or entity immediately after such sale or transfer
is held in the aggregate by the holders of Voting Stock immediately prior to
such sale or transfer; or

                  (c) Any person (as the term "person" is used in Section
13(d)(3) of the Securities Exchange Act of 1934, as amended (the "Exchange
Act")), other than (i) the Payee,

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(ii) any affiliate of the Payee, (iii) any group including the Payee, or (iv)
any acquiror of Voting Stock from the Payee or any affiliate of the Payee, has
become the beneficial owner (as the term "beneficial owner" is defined under
Rule l3d-3 or any successor rule or regulation promulgated under the Exchange
Act) of securities representing 50% or more of the total votes comprising the
Voting Stock.

                  Notwithstanding the foregoing, a Change of Control shall not
be deemed to occur as a result of any transaction actively promoted or supported
by the Payee or any affiliate of the Payee.

         4. POSITIVE COVENANTS OF THE COMPANY. The Company covenants and agrees
that, on or before the Maturity Date it shall:

                  (a) Promptly pay and discharge all material and lawful taxes,
assessments, and governmental charges or levies imposed upon the Company or upon
its income and profits, or upon any of its property, before the same shall
become in default, as well as all material and lawful claims for labor,
materials and supplies that, if unpaid, might become a lien or charge upon such
properties or any part thereof, except where the failure to comply would not
have a material adverse effect on the Company and except that the Company shall
not be required to pay and discharge any such tax, assessment, charge, levy or
claim so long as the validity thereof shall be contested in good faith by the
Company;

                  (b) Do or cause to be done all things reasonably necessary to
preserve and keep in full force and effect its corporate existence, rights and
franchises and comply with all material laws applicable to the Company, except
where the failure to comply would not have a material adverse effect on the
Company;

                  (c) At all times reasonably maintain, preserve, protect and
keep its material property used or useful in the conduct of its business in good
repair, working order and condition, and from time to time make all needful and
proper repairs, renewals, replacements and improvements thereto as shall be
reasonably required in the conduct of its business, except where the failure to
comply would not have a material adverse effect on the Company;

                  (d) To the extent necessary for the operation of its business,
keep adequately insured by financially sound reputable insurers, all material
property of a character usually insured by similar corporations and carry such
other insurance as is usually carried by similar corporations, except where the
failure to obtain insurance would not have a material adverse effect on the
Company;

                  (e) Prior to the issuance of any Common Stock hereunder,
reserve for issuance a sufficient number of authorized but unissued shares of
Common Stock to allow for their issuance hereunder upon conversion of this Note;
and

                  (f) At all times keep true and correct books, records and
accounts.

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<PAGE>   4

         5.       REPRESENTATIONS AND WARRANTIES OF THE PAYEE.
                  --------------------------------------------

                  (a) GENERAL. The Payee understands and acknowledges that the
Note and the securities into which it is convertible are being offered and sold
under one or more of the exemptions from registration provided for in Section
4(2) of the Securities Act of 1933, as amended (the "Securities Act") and any
applicable state securities laws. The Payee is purchasing the Note without being
offered or furnished any formal offering literature or prospectus. The Payee
understands that this transaction has not been reviewed or approved by the
Securities and Exchange Commission or by any state regulatory authority charged
with the administration of the securities laws of any state. All documents,
records and books pertaining to this investment, as well as management of the
Company, have been made available to the Payee and the representatives of the
Payee, and the books and records of the Company will be available upon
reasonable notice for inspection by the Payee during reasonable business hours
at its principal offices set forth above.

                  (b) SUITABILITY. The Payee confirms that the Payee understands
and has fully considered for purposes of this investment the risks of this
investment and understands that (i) this investment is suitable only for an
investor who is able to bear the economic consequences of losing his or her
entire investment, (ii) the purchase of the Note and the Common Stock is a
speculative investment that involves a high degree of risk, and (iii) there are
substantial restrictions on the transferability of, and there will be no
immediate public market for, the Note, and accordingly, it may not be possible
for the Payee to liquidate the Payee's investment in case of emergency.

                  (c) LACK OF LIQUIDITY. The Payee confirms that the Payee is
able (i) to bear the economic risk of this investment, and (ii) to hold the Note
and the Common Stock for an indefinite period of time. The Payee has sufficient
liquid assets so that the illiquidity associated with this investment will not
cause any undue financial difficulties or affect the Payee's ability to provide
for the Payee's current needs and possible financial contingencies, and that the
Payee's commitment to all speculative investments is reasonable in relation to
the Payee's net worth and annual income.

                  (d) KNOWLEDGE AND EXPERIENCE. The Payee has such knowledge and
experience in financial and business matters that the Payee is capable of
evaluating the merits and risks of this speculative investment and of making an
informed investment decision.

                  (e) ACCREDITED INVESTOR. The Payee is an "accredited investor"
as defined in Rule 501 of Regulation D under the Securities Act.

                  (f) ACCESS TO MANAGEMENT. The Payee confirms that, in making
the decision to purchase the Note and the Common Stock, the Payee has relied
solely upon independent investigations made by the Payee, and that the Payee has
been given the opportunity to ask questions of, and to receive answers from,
management and other persons acting on behalf of the Company concerning the
Company.

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<PAGE>   5

                  (g) INVESTMENT INTENT. The Note and the Common Stock are being
acquired by the Payee solely for the personal account of the Payee, for
investment purposes only, and not with a view to, or in connection with, any
resale or distribution thereof. The Payee has no contract, undertaking,
understanding, agreement or arrangement, formal or informal, with any person to
sell, transfer or pledge to any person the Note or the Common Stock, or any part
thereof, or any interest therein or any rights thereto. The Payee has no present
plans to enter into any such contract, undertaking, agreement or arrangement.
The Payee must bear the economic risk of the investment for an indefinite period
of time because the Note and the Common Stock have not been registered under the
Securities Act and applicable state securities laws and, therefore, cannot be
sold unless it is subsequently registered under the Securities Act and
applicable state securities laws or unless an exemption from such registration
is available.

                  (h) RESTRICTIVE LEGEND. The Payee consents to the placement of
a restrictive legend on the certificate(s) representing the Common Stock issued
upon conversion hereof to reflect the restrictions on transfer provided under
applicable securities laws.

                  (i) BROKERS. The Payee has not incurred on its own account, or
on account of the Company, any obligation to pay any broker's fee or commission
in connection with this investment.

                  (j) INVESTMENT COMMITMENT NOT DISPROPORTIONATE TO NET WORTH.
The Payee's overall commitment to investments that are not readily marketable is
not disproportionate to the Payee's net worth and the Payee's investment in the
Company will not cause such overall commitment to become excessive.

                  (k) SURVIVAL OF REPRESENTATIONS, WARRANTIES AND
ACKNOWLEDGMENTS. The representations and warranties of the Payee contained in
this Section F are true and accurate as of the date hereof and shall be true and
accurate as of the date of issuance of the Common Stock.

         6. WITHHOLDING. The Company shall be entitled to withhold from all
payments of principal of, and interest on, this Note any amounts required to be
withheld under the applicable provisions of the United States income tax laws or
other applicable law at the time of such payments.

         7. OBLIGATIONS ABSOLUTE. No provision of this Note shall alter or
impair the obligation of the Company, which is absolute and unconditional, to
pay the principal of, and interest on, this Note at the time, place and rate,
and in the security, coin or currency, herein prescribed. This Note is a direct
obligation of the Company.

         8. NO RECOURSE AGAINST INDIVIDUALS. No recourse shall be had for the
payment of the principal of, or the interest on, this Note, or for any claim
based hereon, or otherwise in respect hereof, against any incorporator,
stockholder, officer, employee or director, as such, past, present or future, of
the Company or any successor corporation, whether by virtue of any constitution,
statute or rule of law, or by the enforcement of any assessment or penalty or
otherwise, all such liability being, as part of the consideration for the issue
hereof, expressly waived. The obligation of the Company on this Note is primary
and exclusive.

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<PAGE>   6

         9. COMPLIANCE WITH SECURITIES LAWS. The Payee agrees that this Note is
being acquired for investment and that the Payee shall not offer, sell,
transfer, assign, exchange or otherwise dispose of this Note or the shares of
Common Stock issuable upon conversion hereof except under circumstances that
will not result in a violation of the Securities Act or any applicable state
Blue Sky law or similar laws relating to the sale or transfer of securities.

         10. DEFAULT CONDITIONS. This Note shall become and be due and payable
upon written demand made by the Payee if one or more of the following events,
herein called events of default, shall happen and be continuing:

                  (a) Default in the due observance or performance of any
material covenant, condition or agreement on the part of the Company to be
observed or performed pursuant to the terms hereof and such default shall
continue uncured for 30 days after written notice thereof, specifying such
default, shall have been given to the Company by the Payee;

                  (b) Application for, or consent to, the appointment of a
receiver, trustee or liquidator of the Company or of its property;

                  (c) Admission in writing of the Company's inability to pay its
debts as they mature;

                  (d) General assignment by the Company for the benefit of
creditors;

                  (e) Filing by the Company of a voluntary petition in
bankruptcy or a petition or an answer seeking reorganization, or an arrangement
with creditors;

                  (f) Entering against the Company of a court order approving a
petition filed against it under the federal or state bankruptcy laws, which
order shall not have been vacated or set aside or otherwise terminated within 60
days; or

                  (g) a Change of Control.

         11. NOTICE OF DEFAULT. The Company agrees that notice of the occurrence
of any event of default shall be promptly given to the Payee.

         12. ENFORCEMENT OF RIGHTS. In case any one or more of the events of
default specified above shall happen and be continuing, the Payee may proceed to
protect and enforce his rights by suit in the specific performance of any
covenant or agreement contained in this Note or in aid of the exercise of any
power granted in this Note or may proceed to enforce the payment of this Note or
to enforce any other legal or equitable rights as such Payee.

         13. PAYMENTS. Whenever any payment to be made shall be due on a
Saturday, Sunday or a public holiday under the laws of the Commonwealth of
Delaware, such payment may be made on the next succeeding business day, and such
extension of time shall in such case be included in the computation of payment
of interest due.

                                      E-6

<PAGE>   7

         14. NO TRANSFER OR EXCHANGE OF NOTES. The Company agrees not to
transfer or assign this Note, or any interest herein, by operation of law or
otherwise, without the prior written consent of the Payee. The Payee agrees not
to transfer, assign, negotiate or exchange this Note, or any interest herein, by
operation of law or otherwise, without the prior written consent of the Company.

         15. REPLACEMENT OF NOTE. Upon receipt from the Payee of evidence
satisfactory to the Company of the loss, theft, destruction or mutilation of the
Note and, if requested by the Company in the case of any such loss, theft or
destruction, upon delivery of an indemnity bond or other agreement or security
reasonably satisfactory to the Company, or, in the case of any such mutilation,
upon surrender and cancellation of the Note, the Company shall issue a
substitute Note to the Payee, of like tenor and amount and dated the date
hereof, in lieu of such lost, stolen, destroyed or mutilated Note.

         16. AUTHORIZATION. This Note has been issued by the Company pursuant to
authorization of the Board of Directors of the Company.

         17. PRESENTATION FOR PAYMENT. Payment of principal and interest,
whether in cash or by check, shall be made to the Payee as set forth herein upon
presentation and surrender of this Note upon or after maturity.

         18. WAIVER; AMENDMENT. No provision of this Note may be waived,
amended, modified, superseded, canceled, terminated, renewed or extended except
in a written instrument signed by the party against whom any of the foregoing
action is asserted. Any waiver shall be limited to the particular instance and
for the particular purpose when and for which it is given.

         19. SEVERABILITY; REFORM. The invalidity, illegality or
unenforceability of any provision of this Note shall in no way effect the
validity, legality or enforceability of any other provision of this Note and
this Note shall be construed and reformed by any court of competent jurisdiction
to give full effect to the essential purposes of this Note.

         20. NOTICES. All notices provided for in this Note shall be given in
writing and shall be effective when given by personal delivery or by electronic
facsimile transmission (with receipt thereof electronically confirmed), or the
next business day after delivery to an nationally recognized express overnight
courier service, or three business days after being sent by first class mail,
postage prepaid, addressed to the parties at their respective addresses herein
set forth, or to such other address or addresses as either party may later
specify by written notice to the other.

         21. COUNTERPARTS. This Note may be executed in duplicate counterparts,
which, when taken together, shall constitute one instrument, but only the
original counterpart executed by a duly authorized representative of the Company
shall be deemed to be an original instrument for purposes of enforcing this Note
against the Company.

         22. DISPUTE RESOLUTION. Any dispute, controversy or claim arising out
of, in connection with, or in relation to this Note or the breach of any of the
provisions hereof shall be

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<PAGE>   8

settled by arbitration in Cleveland, Ohio, pursuant to the rules then obtaining
of the American Arbitration Association. Any award shall be final, binding and
conclusive upon the parties and a judgment rendered thereon may be entered in
any court having competent jurisdiction thereof.

         23. GOVERNING LAW. This Note shall be construed and enforced in
accordance with, and the rights of the parties shall be governed by, the laws of
the State of Delaware, without regard to the conflict of laws principles
thereof.

         24. ENTIRE AGREEMENT. This Note constitutes the entire agreement
between the Company and the Payee relative to the subject matter hereof, and
supersedes all proposals or agreements, written or oral, and all other
communications between the parties relating to the subject matter of this Note.

         IN WITNESS WHEREOF, the Company and the Payee have caused this Note to
be executed, as of the date first set forth above, by their duly authorized
representatives.

ROULSTON VENTURES LIMITED PARTNERSHIP
          (the "Payee")

BY:  /s/ THOMAS H. ROULSTON II
     ----------------------------------
NAME:  THOMAS H. ROULSTON II
TITLE: GENERAL PARTNER

PRINCIPAL BUSINESS ADDRESS OF PAYEE:

         4000 Chester Avenue
         Cleveland, Ohio 44103

AMERICAN STONE INDUSTRIES, INC.
         (the "Company")

BY:  /s/ JAMES M. RALLO
     ----------------------------------
NAME:  JAMES M. RALLO
TITLE: PRESIDENT AND CHIEF EXECUTIVE OFFICER

                                      E-8

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