SECURITIES AND EXCHANGE COMMISSION

                             Washington, D. C. 20549

                                  SCHEDULE l3D

                    Under the Securities Exchange Act of 1934
                                (Amendment No. )*

                               HARSCO CORPORATION
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                                (Name of Issuer)

                                  Common Stock
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                         (Title of Class of Securities)

                                    415864107
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                                 (CUSIP Number)

                                                     with a copy to:
  Alexander J. Roepers                               Allen B. Levithan
  Atlantic Investment Management, Inc.               LOWENSTEIN SANDLER PC
  666 Fifth Avenue                                   65 Livingston Avenue
  New York, New York  10103                          Roseland, New Jersey  07068
  (212) 484-5050                                     (973) 597-2500

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                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                December 13, 2001
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             (Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on  Schedule l3G to report
the acquisition  which is the  subject of this  Schedule 13D, and is filing this
schedule because of Rule 13d-1(e), (f) or (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 Rule l3d-7(b) 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).

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CUSIP NO. 415864107
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   1)   Names of Reporting Persons.  I.R.S. Identification Nos. of Above Persons
        (entities only):

                      Atlantic Investment Management, Inc.
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   2)   Check the Appropriate Box if a Member of a Group (See Instructions):

                 (a) [ ]              (b) [ ]

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   3)   SEC Use Only

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   4)   Source of Funds (See Instructions):  AF, OO

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   5)   Check if Disclosure of Legal Proceedings is Required Pursuant to Items
        2(d) or 2(e):
                                 Not Applicable
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   6)   Citizenship or Place of Organization:   Delaware

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        Number of                    7)   Sole Voting Power:         2,031,300*
                                     -------------------------------------------
        Shares Beneficially          8)   Shared Voting Power:               0
                                     -------------------------------------------
        Owned by
        Each Reporting               9)   Sole Dispositive Power:     2,031,300*
                                     -------------------------------------------
        Person  With:               10)   Shared Dispositive Power:           0
                                     -------------------------------------------
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   11)  Aggregate Amount Beneficially Owned by Each Reporting Person:

        2,031,300*
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   12)  Check if the Aggregate Amount in Row (11) Excludes Certain Shares
        (See Instructions):
                                 Not Applicable
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   13)  Percent of Class Represented by Amount in Row (11):     5.1%*
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   14)  Type of Reporting Person (See Instructions):   IA
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*    Includes: (i) 396,143 shares (1.0%) of the Issuer's common stock, par value
     $1.25 per share ("Shares"),  beneficially owned by AJR International (BVI),
     Inc.,  a  British  Virgin  Islands  company,  (ii)  151,041  Shares  (0.4%)
     beneficially  owned by Quest  Capital  Partners,  L.P., a Delaware  limited
     partnership,  (iii) 862,222  Shares (2.2%)  beneficially  owned by Cambrian
     Fund Ltd., a British  Virgin  Islands  company,  (iv) 231,335 Shares (0.6%)
     beneficially  owned  by  Cambrian   Partners,   L.P.,  a  Delaware  limited
     partnership and (v) 389,059 Shares (1.0%) held in several Managed  Accounts
     ("Managed  Accounts").  In addition,  the sole shareholder of the Reporting
     Person, Mr. Alexander J. Roepers,  beneficially owns 1,500 Shares (0.004%).
     The Reporting  Person,  serving as the investment  advisor of the foregoing
     parties and the Managed  Accounts,  has sole voting and  dispositive  power
     over all Shares  beneficially  owned by such parties or held in the Managed
     Accounts.  See Items 2 and 5 for additional details.





Item 1.  Security and Issuer
         -------------------

         This statement  relates to the common stock, par value $1.25 per  share
(the "Shares"), of Harsco Corporation (the "Issuer").  The Issuer has  principal
executive offices located at Camp Hill, Pennsylvania 17001-8888.

Item 2.  Identity and Background
         -----------------------

         (a)  This  statement is filed by Atlantic  Investment Management, Inc.,
a Delaware  corporation  (the "Reporting  Person"), with  respect  to  2,031,300
Shares over which the Reporting  Person has sole dispositive and voting power by
reason of serving as the investment advisor to (i) AJR International (BVI) Inc.,
a British Virgin Islands company ("AJR"),  (ii) Quest Capital Partners,  L.P., a
Delaware  limited  partnership  ("Quest"),  (iii)  Cambrian Fund Ltd., a British
Virgin  Islands  company  ("Cambrian  Fund"),  (iv) Cambrian  Partners,  L.P., a
Delaware limited partnership ("Cambrian Partners"), (v) several managed accounts
(the "Managed  Accounts") and (vi) Alexander J. Roepers,  the president and sole
shareholder  of the  Reporting  Person.  Mr.  Roepers also serves as the general
partner of Quest and Cambrian Partners.

         (b)  The business  address of the Reporting  Person and Mr.  Roepers is
666 Fifth Avenue, 34th Floor, New York, New York  10103.

         (c)  The  principal  business of  the Reporting  Person is  that of  an
investment  advisor  engaging  in  the  purchase  and  sale  of  securities  for
investment  with the objective of capital  appreciation on behalf of AJR, Quest,
Cambrian Fund,  Cambrian  Partners,  the Managed  Accounts and Mr. Roepers.  The
principal  occupation  of Mr.  Roepers is serving as the  president and managing
officer of the Reporting Person.

         (d)  Neither the  Reporting Person nor Mr. Roepers has, during the past
five (5) years,  been  convicted  in a criminal  proceeding  (excluding  traffic
violations or similar misdemeanors).

         (e)  Neither the Reporting  Person nor Mr. Roepers has, during the past
five  (5)  years,  been a  party  to  any  civil  proceeding  of a  judicial  or
administrative body of competent jurisdiction and as a result of such proceeding
was or is now 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 violation with respect to such laws.

         (f)  Mr. Roepers is a citizen of The Netherlands.





Item 3.  Source and Amount of Funds or Other Consideration
         -------------------------------------------------

         The Shares  purchased by the  Reporting Person on behalf of AJR, Quest,
Cambrian Fund,  Cambrian  Partners and the Managed  Accounts were purchased with
the  investment  capital of such  entities and  accounts.  The Shares  purchased
individually  by Mr.  Roepers  were  purchased  with the  personal  funds of Mr.
Roepers.  The aggregate amount of funds used in making the purchases reported on
this Schedule 13D was $5,530,692.

Item 4.  Purpose of Transaction
         ----------------------

         The Reporting Person  acquired, on behalf of AJR, Quest, Cambrian Fund,
Cambrian Partners,  the Managed Accounts and Mr. Roepers,  and continues to hold
the Shares reported herein for investment purposes. The Reporting Person intends
to evaluate  the  performance  of the Shares as an  investment  in the  ordinary
course of business.  The Reporting  Person pursues an investment  objective that
seeks capital appreciation. In pursuing this investment objective, the Reporting
Person  analyzes the operations,  capital  structure and markets of companies in
which  the  Reporting  Person's  clients  invest,  including  the  Issuer,  on a
continuous  basis  through  analysis  of  documentation   and  discussions  with
knowledgeable  industry and market  observers and with  representatives  of such
companies.

         The  Reporting Person  will continuously  assess the Issuer's business,
financial  condition,  results of operations  and  prospects,  general  economic
conditions,  the  securities  markets  in  general  and those for the  Shares in
particular, other developments and other investment opportunities.  Depending on
such  assessments,  the Reporting  Person may acquire  additional  Shares or may
determine  to sell or otherwise  dispose of all or some of the Shares  presently
held by AJR, Quest,  Cambrian Fund, Cambrian Partners,  the Managed Accounts and
Mr.  Roepers in the open market or in private  transactions.  Such  actions will
depend upon a variety of factors,  including,  without  limitation,  current and
anticipated  future  trading  prices for the Shares,  the  financial  condition,
results of  operations  and  prospects  of the  Issuer,  alternative  investment
opportunities,  general economic,  financial market and industry  conditions and
other  factors that the  Reporting  Person may deem  material to its  investment
decision.

         The  Reporting Person  will continue  its active discussions  with  the
Issuer's  management  with  respect to (i)  actions  which might be taken by the
management  of the Issuer to maximize  shareholder  value of the Issuer and (ii)
improving the Issuer's investor relations. In addition, the Reporting Person may
hold  discussions  with other  parties  who might  engage in  shareholder  value
enhancing activities for the benefit of all of the Issuer's shareholders.  There
can be no  assurance  that the  Reporting  Person  will take any of the  actions
described in the previous sentence.

         Except as set forth above, the Reporting Person has no present plans or
proposals which relate to or would result in any of the transactions required to
be described in Item 4 of Schedule 13D.





Item 5.  Interest in Securities of the Issuer
         ------------------------------------

         (a)  Based  upon the  information contained  in the  Issuer's Quarterly
Report on Form  10-Q  filed  with the  Securities  and  Exchange  Commission  on
December 8, 2001,  there were  issued and  outstanding  39,962,978  Shares as of
October 31, 2001.

         (b)  The  Reporting  Person  does  not  directly  own any  Shares.  The
Reporting Person has entered into an investment  advisory agreement with each of
AJR, Quest, Cambrian Fund, Cambrian Partners and the Managed Accounts,  pursuant
to which the  Reporting  Person has  investment  authority  with  respect to the
securities  held by such entities or in such  accounts.  Such power includes the
power  to  dispose  of and the  power  to vote  the  Shares.  By  reason  of the
provisions of Rule 13d-3 of the Securities Exchange Act of 1934, as amended, the
Reporting Person is deemed to be the beneficial owner of the Shares held by such
entities and accounts.  In addition,  the Reporting  Person has sole dispositive
and  voting  power  over the 1,500  Shares  beneficially  owned by Mr.  Roepers.
Accordingly,  the Reporting  Person is deemed the beneficial  owner of 2,031,300
Shares, or 5.1% of the outstanding Shares.

         (c)  The  following  table details  the transactions  by the  Reporting
Person,  on behalf of AJR,  Quest,  Cambrian  Fund,  Cambrian  Partners  and the
Managed Accounts,  as well as transactions by Mr. Roepers,  in the Shares during
the past sixty (60) days:


Date                     Quantity          Price           Type of Transaction

10/31/01                  35,000          $31.98           Open Market Purchase

10/31/01                  25,000           32.08           Open Market Purchase

11/30/01                  20,000           33.50           Open Market Purchase

11/30/01                  10,000           33.54           Open Market Purchase

12/03/01                  22,700           33.30           Open Market Purchase

12/04/01                   1,800           33.10           Open Market Purchase

12/10/01                  20,000           33.83           Open Market Purchase

12/11/01                   2,000           33.80           Open Market Purchase

12/12/01                   6,300           33.54           Open Market Purchase

12/13/01                  25,000           33.32           Open Market Purchase

12/14/01                  10,000           32.95           Open Market Purchase


         Except for the transactions listed above, neither the Reporting Person,
any entity for which the Reporting Person serves as investment advisor,  nor any
person or entity controlled by the Reporting Person,  nor Mr. Roepers has traded
Shares during the past sixty (60) days.

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

             Not Applicable

Item 7.  Material to be filed as exhibits
         --------------------------------

             Not Applicable





                                    SIGNATURE

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


                                            December 17, 2001


                                            ATLANTIC INVESTMENT MANAGEMENT, INC.


                                       By: /s/ Alexander J. Roepers
                                           -------------------------------------
                                           Alexander J. Roepers, President





      ATTENTION: INTENTIONAL MISSTATEMENTS OR OMISSIONS OF FACT CONSTITUTE
                FEDERAL CRIMINAL VIOLATIONS (SEE 18 U.S.C. 1001).