Document:

Exhibit 10.1

                        INTERCORPORATE SERVICES AGREEMENT

      This INTERCORPORATE SERVICES AGREEMENT (the "Agreement"),  effective as of
January 1, 2001, amends and supersedes (i) that certain Intercorporate  Services
Agreement  effective  as of  January  1, 2000  between  CONTRAN  CORPORATION,  a
Delaware  corporation  ("Contran"),  and  NL  INDUSTRIES,  INC.,  a  New  Jersey
corporation  ("NL")  and (ii) that  certain  Intercorporate  Services  Agreement
effective as of January 1, 2000 between VALHI, INC., a Delaware corporation, and
NL.

                                    Recitals

      A. NL  desires  to have the  services  of certain  Contran  personnel  and
Contran is willing to provide such services under the terms of this Agreement.

      B. Contran  desires to have the services of certain NL personnel and NL is
willing to provide such services under the terms of this Agreement.

      C. The costs of maintaining the additional  personnel necessary to perform
the functions  provided for by this Agreement would exceed the amount charged to
such  party  that is  contained  in the net fee set  forth in  Section 4 of this
Agreement  and that the terms of this  Agreement  are no less  favorable to each
party  than  could  otherwise  be  obtained  from a third  party for  comparable
services.

      D. Each  party  desires  to  continue  receiving  the  services  presently
provided  by the other  party and its  affiliates  and each  party is willing to
continue to provide such services under the terms of this Agreement.

                                    Agreement

      For and in  consideration  of the  mutual  premises,  representations  and
covenants  contained  in  this  Agreement,  and  for  other  good  and  valuable
consideration,  the receipt and sufficiency of which is hereby acknowledged, the
parties hereto mutually agree as follows:

      Section  1.  Contran  Services  to be  Provided.  Contran  agrees  to make
available to NL, upon request,  the following services (the "Contran  Services")
to be rendered by the internal staff of Contran and affiliates of Contran:

            (a)   Consultation   and   assistance   in   the   development   and
      implementation   of  NL's  corporate   business   strategies,   plans  and
      objectives;

            (b)  Consultation  and  assistance  in  management  and  conduct  of
      corporate affairs and corporate governance consistent with the charter and
      bylaws of NL;

            (c) Consultation and assistance in maintenance of financial  records
      and  controls,  including  preparation  and review of  periodic  financial
      statements and reports to be filed with public and regulatory entities and
      those  required to be prepared for financial  institutions  or pursuant to
      indentures and credit agreements;

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            (d)  Consultation and assistance in cash management and in arranging
      financing necessary to implement the business plans of NL;

            (e)    Consultation   and   assistance   in   tax   management   and
      administration,  including, without limitation,  preparation and filing of
      tax returns, tax reporting, examinations by government authorities and tax
      planning; and

            (f) Such other services as may be requested by NL from time to time.

      Section 2. NL  Services to be  Provided.  NL agrees to make  available  to
Contran,   upon  request,   the  following  services  (the  "NL  Services,"  and
collectively  with the Contran  Services,  the "Services") to be rendered by the
internal staff of NL:

            (a) certain  administration and management  services with respect to
      Contran's  insurance  and  risk  management  needs,   including,   without
      limitations, administration of Contran's:

                  (i)   property and casualty insurance program,

                  (ii)  claims management program,

                  (iii) property loss control program, and

            (b) Such other  services as may be requested by Contran from time to
      time.

This  Agreement  does not apply to, and the Services  provided for herein do not
include,  any  services  that Harold C.  Simmons,  Glenn R. Simmons or Steven L.
Watson may provide to Recipient in their roles members of  Recipient's  board of
directors or any other activity related to such board of directors.

      Section 3. Miscellaneous  Services. It is the intent of the parties hereto
that each  party to this  Agreement  provide  (a  "Providing  Party")  only such
Services as are requested by the other party (a "Receiving Party") in connection
with routine management,  financial and administrative  functions related to the
ongoing  operations  of the  Receiving  Party and not with  respect  to  special
projects,  including corporate investments,  acquisitions and divestitures.  The
parties hereto  contemplate  that the Services  rendered by a Providing Party in
connection  with the conduct of each  Receiving  Party's  business  will be on a
scale  compared  to that  existing  on the  effective  date  of this  Agreement,
adjusted  for  internal  corporate  growth  or  contraction,  but not for  major
corporate acquisitions or divestitures,  and that adjustments may be required to
the terms of this Agreement in the event of such major  corporate  acquisitions,
divestitures or special projects. Each Receiving Party will continue to bear all
other costs  required for outside  services  including,  but not limited to, the
outside services of attorneys, auditors, trustees, consultants,  transfer agents
and registrars, and it is expressly understood that each Providing Party assumes
no  liability  for any  expenses  or  services  other than those  stated in this
Agreement to be provided by such party.

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In addition to the amounts  charged to a Receiving  Party for Services  provided
pursuant to this  Agreement,  such Receiving  Party will pay the Providing Party
the amount of  out-of-pocket  costs incurred by the Providing Party in rendering
such Services.

      Section 4. Net Fee for Services.  NL agrees to pay to Contran a net annual
fee of $1,195,000 payable in quarterly installments of $298,750 each, commencing
as of January 1, 2001, pursuant to this Agreement. In addition to the net annual
fee:

            (a) Contran  shall credit or pay to NL  additional  amounts plus all
      related  out-of-pocket  costs, all as agreed to by the parties, for all NL
      Services provided under Subsection 2(b); and

            (b) NL shall  credit or pay to Contran  additional  amounts plus all
      related  out-of-pocket  costs,  all as agreed to by the  parties,  for all
      Contran Services provided under Subsection 1(f).

      Section 5. Original  Term.  Subject to the provisions of Section 6 hereof,
the original  term of this  Agreement  shall be from January 1, 2001 to December
31, 2001.

      Section  6.   Extensions.   This   Agreement   shall  be   extended  on  a
quarter-to-quarter  basis  after the  expiration  of its  original  term  unless
written  notification  is given by Contran or NL thirty  (30) days in advance of
the first  day of each  successive  quarter  or  unless  it is  superseded  by a
subsequent written agreement of the parties hereto.

      Section 7. Limitation of Liability. In providing Services hereunder,  each
Providing  Party shall have a duty to act,  and to cause its agents to act, in a
reasonably  prudent manner,  but no Providing  Party nor any officer,  director,
employee  or agent of such  party  nor or its  affiliates  shall be  liable to a
Receiving  Party for any error of  judgment  or  mistake  of law or for any loss
incurred  by the  Receiving  Party in  connection  with the matter to which this
Agreement relates,  except a loss resulting from willful misfeasance,  bad faith
or gross negligence on the part of the Providing Party.

      Section 8. Indemnification.  Each Receiving Party shall indemnify and hold
harmless the Providing  Party,  its  affiliates and their  respective  officers,
directors  and  employees  from and  against  any and all  losses,  liabilities,
claims,  damages,  costs  and  expenses  (including  attorneys'  fees and  other
expenses  of  litigation)  to which  such  Providing  Party or person may become
subject  arising out of the  Services  provided by such  Providing  Party to the
Receiving  Party  hereunder,  provided that such indemnity shall not protect any
person against any liability to which such person would  otherwise be subject by
reason of willful misfeasance, bad faith or gross negligence on the part of such
person.

      Section 9. Further  Assurances.  Each of the parties  will make,  execute,
acknowledge and deliver such other instruments and documents,  and take all such
other actions,  as the other party may reasonably  request and as may reasonably
be required in order to effectuate  the purposes of this  Agreement and to carry
out the terms hereof.

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<PAGE>

      Section 10. Notices. All communications  hereunder shall be in writing and
shall be addressed,  if intended for Contran,  to Three Lincoln Centre, 5430 LBJ
Freeway, Suite 1700, Dallas, Texas 75240,  Attention:  President,  or such other
address as it shall have furnished to NL in writing,  and if intended for NL, to
Two Greenspoint Plaza, 16825 Northchase Drive, Suite 1200, Houston, Texas 77060,
Attention:  President,  or such  other  address as it shall  have  furnished  to
Contran in writing.

      Section 11.  Amendment and  Modification.  Neither this  Agreement nor any
term hereof may be  changed,  waived,  discharged  or  terminated  other than by
agreement in writing signed by the parties hereto.

      Section 12.  Successor and Assigns.  This Agreement  shall be binding upon
and inure to the benefit of Contran and NL and their  respective  successors and
assigns,  except that neither  party may assign its rights under this  Agreement
without the prior written consent of the other party.

      Section 13.  Governing  Law.  This  Agreement  shall be  governed  by, and
construed and interpreted in accordance with, the laws of the state of Texas.

<PAGE>

      IN WITNESS  WHEREOF,  the parties  hereto have caused this Agreement to be
duly executed and delivered as of the date first above written.

                                       CONTRAN CORPORATION

                                       By:  /s/Steven L. Watson
                                            ----------------------------------
                                            Steven L. Watson
                                            President

                                       NL INDUSTRIES, INC.

                                       By:  /s/Robert D. Hardy
                                            ----------------------------------
                                            Robert D. Hardy
                                            Vice PresidentExhibit 10.2

                        INTERCORPORATE SERVICES AGREEMENT

      INTERCORPORATE  SERVICES AGREEMENT  effective as of January 1, 2001 by and
between  Tremont  Corporation  ("Tremont"),  a  Delaware  corporation,   and  NL
Industries, Inc. ("NL"), a New Jersey corporation.

      WHEREAS,  Tremont  desires that NL provide certain tax services and use of
NL's corporate  aircraft to Tremont,  and NL is willing to provide such services
to Tremont pursuant to the terms of this Agreement.

      NOW,  THEREFORE,  in  consideration of the premises and promises set forth
herein, the parties to this Agreement agree as follows:

      1.    Services   Provided.   NL  will  make  available  to  Tremont  the
following services (the "Services"):

            (a)   consultation    and   assistance   in   tax   management   and
                  administration, including, without limitation, preparation and
                  filing  of  tax  returns,   tax  reporting,   examinations  by
                  government authorities and tax planning; and

            (b)   use of corporate aircraft.

      2. Fees for Services and  Reimbursement  of Expenses.  During the Term (as
defined  below) of this  Agreement,  Tremont  shall  pay to NL an annual  fee of
$79,725 (the "Annual  Fee") for the Services  described in paragraph  1(a) above
payable in quarterly  installments  of $19,931 plus all  out-of-pocket  expenses
incurred in connection with the performance of such Services. Regarding Services
described in  Paragraph  1(b),  Tremont  will pay to NL within  thirty (30) days
after receipt of an invoice an amount equal to Tremont's share of NL's corporate
aircraft expenses which includes  Tremont's share of the monthly  management fee
(computed on a per hour basis) and actual  flight hour costs at a rate of $1,875
per hour (subject to annual escalation) plus fuel variable charges, segment fees
and excise  taxes.  Notwithstanding  the  foregoing,  in the event that  Tremont
determines,  in its sole  discretion,  that it no longer desires  certain of the
Services or NL determines, in its sole discretion,  that it no longer desires to
provide  certain of the  Services,  then  Tremont or NL, as  appropriate,  shall
provide  the  other  party  with a  thirty  (30) day  prior  written  notice  of
cancellation  describing  the  Services to be  terminated  or  discontinued  and
Tremont and NL during such ninety-day period shall agree to a pro-rata reduction
of the fees due hereunder for such terminated or discontinued Services.

      3. Limitation of Liability. In providing Services hereunder, NL shall have
a duty to act, and to cause its agents to act, in a reasonably  prudent  manner,

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but  neither  NL nor any  officer,  director,  employee  or agent of NL shall be
liable to Tremont or its  subsidiaries  for any error of  judgment or mistake of
law or for any loss incurred by Tremont or its  subsidiaries  in connection with
the  matters to which  this  Agreement  relates,  except a loss  resulting  from
willful  misfeasance,  bad faith or gross  negligence  on the part of NL or from
NL's reckless disregard of obligations and duties under this Agreement.

      4.  Indemnification  of NL by Tremont.  Tremont  shall  indemnify and hold
harmless NL, its  subsidiaries  and their  respective  officers,  directors  and
employees  from and against any and all losses,  liabilities,  claims,  damages,
costs and expenses (including  reasonable  attorneys' fees and other expenses of
litigation) to which such party may become subject  arising out of the provision
by NL to Tremont and its subsidiaries of any of the Services, provided that such
indemnity  shall not protect any such party  against any liability to which such
person would otherwise by subject by reason of willful  misfeasance,  bad faith,
gross negligence or reckless disregard of obligations and duties hereunder.

      5. Further Assurance. Each of the parties will make, execute,  acknowledge
and  deliver  such  other  instruments  and  documents,  and take all such other
actions,  as the other party may  reasonably  request and as may  reasonably  be
required in order to effectuate  the purposes of this Agreement and to carry out
the terms hereof.

      6. Notices. All communications  hereunder shall be in writing and shall be
addressed to:

            If to NL:         NL Industries, Inc.
                              16825 Northchase Drive, Suite 1200
                              Houston, Texas 77060
                              Attention:  General Counsel

            If to Tremont:    Tremont Corporation
                              1999 Broadway, Suite 4300
                              Denver, Colorado 80202
                              Attention:  General Counsel

            or such other  address as the  parties  shall  have  specified  in
            writing.

      7. Amendment and Modification.  Neither this Agreement nor any item hereof
may be changed,  waived,  discharged  or  terminated  other than by agreement in
writing signed by the parties hereto.

      8.  Successors and Assigns.  This Agreement  shall inure to the benefit of
and be binding upon the respective successors and assigns of the parties hereto,
provided that this Agreement may not be assigned by either of the parties hereto
without the prior written consent of the other party.

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      9.  Miscellaneous.  The  headings  contained  in  this  Agreement  are for
reference  purposes  only  and  shall  not  affect  in any  way the  meaning  or
interpretation  of  this  Agreement.   This  Agreement  constitutes  the  entire
agreement, and supersedes all prior agreements and understandings,  both written
and oral,  between the parties with respect to the subject matter  hereof.  This
Agreement  may be executed in one or more  counterparts,  each of which shall be
deemed an original,  and all of which together shall constitute one and the same
instrument.  This  Agreement  shall  be  governed  in  all  respects,  including
validity, interpretation and affect, by the laws of the State of Texas.

      10. Term of Agreement.  This Agreement shall be effective as of January 1,
2001,  and shall remain in effect for a term of one year until December 31, 2001
(the  "Term");  provided,   however,  the  Agreement  shall  be  extended  on  a
quarter-to-quarter  basis  after  the  expiration  of the  Term  unless  written
notification  is given by either  party thirty (30) days in advance of the first
day of each  successive  quarter or unless it is  terminated  or superseded by a
subsequent  written  agreement of the parties hereto.  Upon such  termination or
upon the  expiration  of this  Agreement,  the parties'  rights and  obligations
hereunder  shall  cease  and  terminate   except  with  respect  to  rights  and
obligations arising on or prior to the date of expiration or termination and the
rights and obligations arising under paragraph 4 above.

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      IN WITNESS  WHEREOF,  the parties have duly executed this  Agreement as of
the 9th day of May, 2001,  which Agreement will be deemed to be effective as of
January 1, 2001.

                                    NL INDUSTRIES, INC.

                                    By:   /s/Robert D. Hardy
                                          ---------------------------
                                          Robert D. Hardy
                                          Vice President

                                    TREMONT CORPORATION

                                    By:   /s/Mark A. Wallace
                                          ---------------------------
                                          Mark A. Wallace
                                          Vice President

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