--------------------------------------------------------------------------------

                                                      --------------------------
                                                              OMB APPROVAL
                                                      --------------------------
                                                      OMB NUMBER: 3235-0145
                                                      EXPIRES: DECEMBER 31, 2005
                                                      ESTIMATED AVERAGE BURDEN
                                                      HOURS PER RESPONSE......11
                                                      --------------------------

                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  SCHEDULE 13D

                        UNDER THE SECURITIES ACT OF 1934
                               (AMENDMENT NO. 13)*


                             BERKSHIRE BANCORP INC.
--------------------------------------------------------------------------------
                                (NAME OF ISSUER)


                          COMMON STOCK, $.10 PAR VALUE
--------------------------------------------------------------------------------
                         (TITLE OF CLASS OF SECURITIES)


                                   084597-10-3
--------------------------------------------------------------------------------
                                 (CUSIP NUMBER)


                                Emanuel J. Adler
                                 Blank Rome LLP
                              405 Lexington Avenue
                            New York, New York 10174
                                 (212) 885-5000
--------------------------------------------------------------------------------
                  (NAME, ADDRESS AND TELEPHONE NUMBER OF PERSON
                AUTHORIZED TO RECEIVE NOTICE AND COMMUNICATIONS)


                                  March 4, 2005
--------------------------------------------------------------------------------
             (DATE OF EVENT WHICH REQUIRES FILING OF THIS STATEMENT)


IF THE FILING PERSON HAS PREVIOUSLY  FILED A STATEMENT ON SCHEDULE 13G TO REPORT
THE  ACQUISITION  THAT IS THE SUBJECT OF THIS  SCHEDULE  13D, AND IS FILING THIS
SCHEDULE BECAUSE OF SS.SS.240.13D-1(E),  240.13D-1(F) OR 240.13D-1(G), CHECK THE
FOLLOWING BOX |_|.

NOTE:  SCHEDULES  FILED IN PAPER FORMAT SHALL INCLUDE A SIGNED ORIGINAL AND FIVE
COPIES OF THE  SCHEDULE,  INCLUDING  ALL EXHIBITS.  SEE  SS.240.13D-7  FOR OTHER
PARTIES TO WHOM COPIES ARE TO BE SENT.

* THE REMAINDER OF THIS COVER PAGE SHALL BE FILLED OUT FOR A REPORTING  PERSON'S
INITIAL FILING ON THIS FORM WITH RESPECT TO THE SUBJECT CLASS OF SECURITIES, AND
FOR  ANY  SUBSEQUENT   AMENDMENT   CONTAINING   INFORMATION  WHICH  WOULD  ALTER
DISCLOSURES PROVIDED IN A PRIOR COVER PAGE.

THE INFORMATION REQUIRED ON THE REMAINDER OF THIS COVER PAGE SHALL NOT BE DEEMED
TO BE "FILED" FOR THE PURPOSE OF SECTION 18 OF THE  SECURITIES  EXCHANGE  ACT OF
1934 ("ACT") OR OTHERWISE  SUBJECT TO THE LIABILITIES OF THAT SECTION OF THE ACT
BUT  SHALL BE  SUBJECT  TO ALL OTHER  PROVISIONS  OF THE ACT  (HOWEVER,  SEE THE
NOTES).

PERSONS WHO ARE TO RESPOND TO THE  COLLECTION OF  INFORMATION  CONTAINED IN THIS
FORM ARE NOT REQUIRED TO RESPOND UNLESS THE FORM DISPLAYS A CURRENTLY  VALID OMB
CONTROL NUMBER.

SEC 1746 (11-03)

                               PAGE 1 OF 8 PAGES


CUSIP NO. 084597-10-3
--------------------------------------------------------------------------------
(1)   NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY).

      MOSES MARX
--------------------------------------------------------------------------------
(2)   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                         (A) |X|
                                                                         (B) |_|
--------------------------------------------------------------------------------
(3)   SEC USE ONLY

--------------------------------------------------------------------------------
(4)   SOURCE OF FUNDS

      N/A
--------------------------------------------------------------------------------
(5)   CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
      ITEMS 2(D) OR 2(E)
                                                                             |_|
--------------------------------------------------------------------------------
(6)   CITIZENSHIP OR PLACE OF ORGANIZATION

      UNITED STATES
--------------------------------------------------------------------------------
NUMBER OF         (7)   SOLE VOTING POWER
SHARES
BENEFICIALLY            3,557,693 (includes options to purchase 1,000 shares of
OWNED                   Common Stock)
BY EACH           --------------------------------------------------------------
REPORTING         (8)   SHARED VOTING POWER
PERSON WITH
                        -0-
                  --------------------------------------------------------------
                  (9)   SOLE DISPOSITIVE POWER

                        3,557,693 (includes options to purchase 1,000 shares of
                        Common Stock)
                  --------------------------------------------------------------
                  (10)  SHARED DISPOSITIVE POWER

                        -0-
--------------------------------------------------------------------------------
(11)  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      3,557,693 (includes options to purchase 1,000 shares of Common Stock)
--------------------------------------------------------------------------------
(12)  CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
      (SEE INSTRUCTIONS)                                                     |X|
--------------------------------------------------------------------------------
(13)  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

      52.7%
--------------------------------------------------------------------------------
(14)  TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

      IN
--------------------------------------------------------------------------------


                               PAGE 2 OF 8 PAGES


CUSIP NO. 084597-10-3
--------------------------------------------------------------------------------
(1)   NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY).

      MOMAR CORPORATION
--------------------------------------------------------------------------------
(2)   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                         (A) |X|
                                                                         (B) |_|
--------------------------------------------------------------------------------
(3)   SEC USE ONLY

--------------------------------------------------------------------------------
(4)   SOURCE OF FUNDS

      N/A
--------------------------------------------------------------------------------
(5)   CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
      ITEMS 2(D) OR 2(E)
                                                                             |_|
--------------------------------------------------------------------------------
(6)   CITIZENSHIP OR PLACE OF ORGANIZATION

      MARYLAND
--------------------------------------------------------------------------------
NUMBER OF         (7)   SOLE VOTING POWER
SHARES
BENEFICIALLY            285,000
OWNED             --------------------------------------------------------------
BY EACH           (8)   SHARED VOTING POWER       
REPORTING           
PERSON WITH             -0-
                  --------------------------------------------------------------
                  (9)   SOLE DISPOSITIVE POWER

                        285,000
                  --------------------------------------------------------------
                  (10)  SHARED DISPOSITIVE POWER

                        -0-
--------------------------------------------------------------------------------
(11)  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      285,000
--------------------------------------------------------------------------------
(12)  CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
      (SEE INSTRUCTIONS)                                                     |_|
--------------------------------------------------------------------------------
(13)  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

      4.2%
--------------------------------------------------------------------------------
(14)  TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

      CO
--------------------------------------------------------------------------------


                               PAGE 3 OF 8 PAGES


CUSIP NO. 084597-10-3
--------------------------------------------------------------------------------
(1)   NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY).

      TERUMAH FOUNDATION, INC.
--------------------------------------------------------------------------------
(2)   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                         (A) |X|
                                                                         (B) |_|
--------------------------------------------------------------------------------
(3)   SEC USE ONLY

--------------------------------------------------------------------------------
(4)   SOURCE OF FUNDS

      WC, 00
--------------------------------------------------------------------------------
(5)   CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
      ITEMS 2(D) OR 2(E)
                                                                             |_|
--------------------------------------------------------------------------------
(6)   CITIZENSHIP OR PLACE OF ORGANIZATION

      NEW YORK
--------------------------------------------------------------------------------
NUMBER OF         (7)   SOLE VOTING POWER
SHARES
BENEFICIALLY            391,163
OWNED             --------------------------------------------------------------
BY EACH           (8)   SHARED VOTING POWER       
REPORTING           
PERSON WITH             -0-
                  --------------------------------------------------------------
                  (9)   SOLE DISPOSITIVE POWER

                        391,163
                  --------------------------------------------------------------
                  (10)  SHARED DISPOSITIVE POWER

                        -0-
--------------------------------------------------------------------------------
(11)  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      391,163
--------------------------------------------------------------------------------
(12)  CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
      (SEE INSTRUCTIONS)                                                     |_|
--------------------------------------------------------------------------------
(13)  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

      5.8%
--------------------------------------------------------------------------------
(14)  TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

      CO
--------------------------------------------------------------------------------


                               PAGE 4 OF 8 PAGES


Item 2.     Identity and Background.

            (a) This Amendment No. 13 amends and  supplements  the Schedule 13D,
            as  amended  and  supplemented  by  Amendments  Nos.  1 through  12,
            inclusive (the "Schedule  13D"),  of Moses Marx, an individual,  and
            Momar Corporation, a Maryland corporation ("Momar"), with respect to
            the Common  Stock,  $.10 par value  ("Common  Stock")  of  Berkshire
            Bancorp Inc., a Delaware corporation (the "Company"), formerly known
            as Cooper Life Sciences,  Inc. Except as amended  hereby,  there has
            been no change in the  information  contained in the  Schedule  13D.
            Pursuant  to  Rule  13d-1(f)(1)  promulgated  under  the  Securities
            Exchange Act of 1934, as amended (the "Exchange Act"), this Schedule
            13D is being filed by Mr. Marx, Momar and Terumah Foundation,  Inc.,
            a  New  York  not-for-profit  corporation  (the  "Foundation").  The
            individual and entities  hereinabove  set forth  (collectively,  the
            "Reporting  Persons") are making this single,  joint filing  because
            they may be deemed to  constitute  a "group"  within the  meaning of
            Section  13d(d)(3) of the Exchange  Act.  Information  regarding Mr.
            Marx  and  Momar  in  response  to Item 2 of  Schedule  13D has been
            previously  submitted  in prior  filings of this  Schedule  13D. Set
            forth below is such information regarding the Foundation.

            (b) - (c)

            The  Foundation  is a  New  York  not-for-profit  corporation  and a
            501(c)(3) tax exempt organization. The principal business address of
            the  Foundation  is 160 Broadway,  New York,  NY 10038.  Pursuant to
            Instruction  C to  Schedule  13D,  the  executive  officers  of  the
            Foundation  are  Moses  Marx  -  President,  Dr.  Joseph  M.  Fink -
            Treasurer, and Philippe Katz - Secretary; the "Key Directors" of the
            Foundation,  as defined in the Foundation's  by-laws, are Moses Marx
            and Marga Marx; and the "Directors" of the Foundation, as defined in
            the Foundation's by-laws, are Philippe Katz, Esther Katz, Dr. Joseph
            M. Fink and Eva Fink. By resolution dated March 4, 2005, the by-laws
            of the  Foundation  were amended so that each Key Director has three
            votes and each  Director has one vote on the  Foundation's  Board of
            Directors.  Mr. Marx, Mr. Katz and Dr. Fink are principally employed
            as private  investors and their  principal  business  address is 160
            Broadway, New York, NY 10038. Mrs. Marx is principally employed as a
            college  administrator.  Mrs.  Katz  and Mrs.  Fink are  principally
            employed as homemakers. The principal business address of Mrs. Marx,
            Mrs. Katz and Mrs.  Fink is c/o the  Foundation,  160 Broadway,  New
            York, NY 10038.

            (d) Neither the  Foundation  nor any other person  described in this
            Item 2 has, during the last five years, been convicted in a criminal
            proceeding.

            (e) Neither the  Foundation  nor any other person  described in this
            Item 2 has,  during  the last  five  years,  been a party to a civil
            proceeding  of  a  judicial  or  administrative  body  of  competent
            jurisdiction and as a result of such proceeding was or is subject to
            a judgment, decree or final order enjoining future violations of, or
            prohibiting  or mandating  activities  subject to,  federal or state
            securities laws or finding any violations with respect to such laws.

Item 3.     Source and Amount of Funds or other Consideration.

            The shares of Common Stock reported in Item 5 as beneficially  owned
            by the  Foundation  were  received by the  Foundation  as charitable
            donations or purchased in the open market.


                               PAGE 5 OF 8 PAGES


Item 4.     Purpose of the Transaction.

            The shares of Common Stock  reported in Item 5 herein were  acquired
            by the  Foundation  for  investment  purposes.  The  Foundation  may
            acquire shares of Common Stock by donation or otherwise from time to
            time and may  dispose  of any or all of the  shares of Common  Stock
            beneficially  owned by it (to the  extent it has  dispositive  power
            over  such  shares)  at any  time.  The  Foundation  has no plans or
            proposals  which  relate to, or could  result in any of the  matters
            referred to in Paragraphs (b) through (j) of Item 4 of Schedule 13D.

Item 5.     Interest in Securities of the Issuer.

            (a) - (b)

            According  to the  Company's  Quarterly  Report on Form 10-Q for the
            period ended  September  30, 2004,  there were  6,748,675  shares of
            Common Stock outstanding on November 5, 2004.

            As of the date of this  Amendment  No. 13,  Moses Marx  beneficially
            owned  3,557,693   shares  of  Common  Stock,   representing   52.7%
            (calculated in accordance with the  instructions to Schedule 13D) of
            the  issued  and  outstanding  shares  of  the  Common  Stock.  Said
            securities  consist of (i)  2,880,530  shares owned  directly by Mr.
            Marx;  (ii)  285,000  shares  owned of record  by Momar  Corporation
            ("Momar");  (iii) 391,163 shares owned of record by the  Foundation;
            and (iv)  options to purchase  1,000  shares of Common  Stock.  With
            respect to the shares  described in clauses (ii) and (iii), Mr. Marx
            may be deemed to be a  beneficial  owner of such shares by virtue of
            his being the only person (in the case of the Foundation,  by voting
            together with his wife,  Marga Marx, who together  constitute six of
            the ten votes on the Foundation's Board for Directors) in a position
            to determine the  investment  and voting  decisions of Momar and the
            Foundation, respectively, with respect to such shares.

            The  foregoing  does not include any of the 160,500  shares owned by
            Eva and  Esther,  L.P.,  of which  Mr.  Marx  has an  80.5%  limited
            partnership  interest and of which Mr.  Marx's  daughters  and their
            husbands are the general partners.

            (c) The Reporting  Persons  effected no  transactions  in the Shares
            during the last 60 days.

            (d) Each of the Reporting  Persons affirms that no person other than
            the  Reporting  Persons  has the right to  receive,  or the power to
            direct the receipt of dividends  from, or the proceeds from the sale
            of, the Common Stock owned by the Reporting Persons.

            (e) It is inapplicable  for the purposes hereof to state the date on
            which the  Reporting  Persons  ceased to be the  owners of more than
            five percent of the Common Stock.

Item 6.     Contracts,   Arrangements,   Understandings  or  Relationships  with
            Respect to Securities of the Issuer.

            Except as set forth above or  elsewhere  in this  Schedule  13D, the
            Reporting   Persons   do  not   have  any   contract,   arrangement,
            understanding  or relationship  (legal or otherwise) with any person
            with respect to any  securities of the Company,  including,  but not
            limited  to,  transfer  or voting of any such  securities,  finders'
            fees, joint ventures,  loan or option  arrangements,  puts or calls,
            guarantees of profits,  division of profits or losses, or the giving
            or withholding of proxies.

Item 7.     Material to be Filed as Exhibits.

            1.  Agreement  dated March 21,  2005,  among the  Reporting  Persons
            relating  to the  filing  of a  joint  statement  pursuant  to  Rule
            13d-1(k).


                               PAGE 6 OF 8 PAGES


                                    SIGNATURE

            After  reasonable  inquiry,  and to the  best of our  knowledge  and
belief, the undersigned certify that the information set forth in this statement
is true, complete and correct.

Date: March 21, 2005


                                           /s/ Moses Marx
                                           -------------------------------------
                                           MOSES MARX

                                           MOMAR CORPORATION


                                           By: /s/ Moses Marx
                                               ---------------------------------
                                               Name:  Moses Marx
                                               Title: President

                                           TERUMAH FOUNDATION, INC.


                                           By: /s/ Philippe D. Katz
                                               ---------------------------------
                                               Name:  Philippe D. Katz
                                               Title: Secretary


                               PAGE 7 OF 8 PAGES


                                                                       Exhibit 1

      The  undersigned  hereby agree,  pursuant to Rule 13d-1(k) to file a joint
statement on Schedule 13D and amendments  thereto  pertaining to their shares of
Common Stock of Berkshire Bancorp Inc.

      This  agreement  may be  terminated  for any  reason by any  party  hereto
immediately  upon the personal  delivery or facsimile  transmission of notice to
that effect to the other parties hereto.

      This agreement may be executed in  counterparts  and all so executed shall
constitute one agreement.

Date: March 21, 2005


                                           /s/ Moses Marx
                                           -------------------------------------
                                           MOSES MARX

                                           MOMAR CORPORATION


                                           By: /s/ Moses Marx
                                               ---------------------------------
                                               Name:  Moses Marx
                                               Title: President

                                           TERUMAH FOUNDATION, INC.


                                           By: /s/ Philippe D. Katz
                                               ---------------------------------
                                               Name:  Philippe D. Katz
                                               Title: Secretary


                               PAGE 8 OF 8 PAGES