CONFIDENTIAL TREATMENT REQUESTED FOR ALL BRACKETED ([]) INFORMATION. THE
CONFIDENTIAL PORTION HAS BEEN SO OMITTED AND FILED SEPARATELY WITH THE
COMMISSION.

THIS LICENSING AGREEMENT is made the 28th day of January one thousand nine
hundred and eighty between GUNNESS WHARF LIMITED having their registered office
at Gunness Wharf, Nr Scunthorpe, Humberside (hereinafter called "the Licensor"
which expression where the context so admits shall include all persons deriving
title under them) of the one part and BOC LIMITED having their registered office
at Hammersmith House, London W6 (hereinafter called "the Licensee" which
expression where the context so admits shall include all persons deriving title
under them) of the other part

WHEREAS,

1. The Licensee under an Agreement between the Parties dated 2 July one thousand
nine hundred and seventy three has been granted a licence by the Licensor to
occupy and use certain land and premises to carry on the manufacture and
distribution of Carbide Mixtures and

2. The Licensee wishes to expand its operations for the manufacture and
distribution of Carbide Mixtures and to take on licence from the Licensor
additional land and premises and the Licensor is willing to make such lands and
premises available to the Licensee

NOW THIS AGREEMENT WITNESSETH as follows

1. IN CONSIDERATION of the payments covenants conditions and agreements
hereinafter contained the Licensor hereby grants to the Licensee full right
licence and authority to occupy and use the undermentioned premises to enable
the Licensee to construct, operate, and maintain a facility for the manufacture
and distribution of Carbide Mixtures and such other activities as are set out in
the Managing Agents Agreement dated 28th January 1980 (hereinafter referred to
as "the Facilities") ALL THAT piece or parcel of land containing 8,000 square
metres or thereabouts situated within the Althorpe Wharf Site at Althorpe,
Humberside ('hereinafter referred to as "Althorpe") and delineated and marked
"A" on the plan annexed hereto which plan is hereinafter referred to as "the
Plan" and thereon coloured pink and hereinafter referred to as "the licensed
premises" TOGETHER WITH the right from time to time during the continuance of
the term hereby granted (a) to use such existing services in and about Althorpe
as may be reasonably required by the Licensee and to request the Licensor to
provide such additional or modified services in and about Althorpe as may be
reasonably required by the Licensee whether in accordance with any statute or
bye-law or otherwise in connection with the use of the licensed premises for the
purposes above mentioned and to connect the said services to any of the
Licensor's existing services which in the opinion of the Licensor are suitable
for the purpose (b) the right for the Licensee and all persons authorised by
them to pass and repass on foot and with or without vehicles over such routes
(hereinafter called the "Access roads") and on such conditions as are agreed by
the Licensor from time to time for the purpose of going to and from the licensed
premises and (c) the use on such terms and for such payments as shall be agreed
during the period of construction or reconstruction or any expansion or
modification of the







Facilities or in the event of the termination of that part of the Managing
Agents Agreement dated 28th January 1980 between the Parties relating to the
supervision and carrying out of the grinding and mixing process of such office
and canteen accommodation telephones and toilets as are at the time existing at
Althorpe and can reasonably be made available by the Licensors to the Licensee
and all persons authorise by them TO HOLD -- the licensed premises unto the
Licensee until the expiry of 20 years from the Effective Date as defined in the
said Managing Agents Agreement SUBJECT ALWAYS to the right of the Licensee
exercisable at any time after 31 December 1981 to terminate this Licensing
Agreement by six months prior notice in writing expiring on any anniversary of
31 December 1981 YIELDING AND PAYING therefor the yearly payment of [
         ] or such greater or lesser payment as may be mutually agreed or
determined in accordance with the provisions of Clause 4 hereof by equal
quarterly payments in arrear on the last day of March the last day of June the
last day of September and the last day of December in every year commencing on
the last day of December 1979

2. The Licensee hereby covenants with the Licensor in manner following:

(1) to make the said payments at the times and in the manner above provided
without any deduction

(2) to pay and discharge all existing and future rates taxes duties and charges
payable in respect of the licensed premises

(3) to consult with the Licensor before erecting or placing upon the licensed
premises any buildings plant and equipment deemed necessary by the Licensee for
the purpose of manufacturing the said Carbide Mixtures the Licensor where
requested by the Licensee applying for and on behalf of the Licensee and
obtaining for and at the cost of the Licensee all necessary planning permissions
bye-law consents and other consents required to enable the licensed premises to
be used as a manufacturing and distribution facility as aforesaid

(4)      (a)      to provide details of all services required by the Licensee to
                  enable the licensed premises to be used as aforesaid and to
                  consult with the Licensor in order to determine the most
                  suitable manner in which such services can be installed or
                  provided

         (b)      to meet the cost of the provision by the Licensor of all
                  additional or modified services as provided for in Clause 1
                  (a) hereof

(5) Not during the said term hereby granted to erect or place on or in the
licensed premises any buildings or plant drains pipes cables or services except
in consultation with the Licensor and in accordance with descriptions previously
provided for the Licensor's information

(6)      (a)      to agree with the Licensor reasonable times for the execution
                  of all works under these presents in connection with the
                  preparation for and expansion or modification of the
                  Facilities which work to be undertaken by the Licensee with
                  all reasonable despatch


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                  and to arrange for the restoration and making good to the
                  reasonable satisfaction of the Licensors of all lands and
                  works of Licensors which may be interfered with in the
                  execution thereof all such matters to be at the cost of the
                  Licensee

         (b)      to comply with all existing and reasonable future rules and
                  regulations laid down by the Licensor and other responsible
                  officials and authorities from time to time in order to secure
                  proper and reasonable conduct of Althorpe which has multiple
                  occupancy

(7) From time to time and at all times during the continuance of the said term
and at their own risk and expense well and sufficiently to arrange for the
maintenance upholding and keeping of the licensed premises and all other
approved works in good order repair and condition to the reasonable satisfaction
of the Licensor at the cost of the Licensee

(8) To permit the Licensor and their servants or agents as often as is
reasonably necessary during the said term during normal working hours to enter
upon the licensed premises or any part thereof to examine the state of repair
and condition thereof and the Licensee will arrange for the repair and making
good of all defects and wants of reparation for which the Licensee is liable at
the cost of the Licensee

(9) To indemnify the Licensor and their servants or agents against any injury or
damage arising out of the use or otherwise of the licensed premises due to the
fault or negligence of the Licensee and during the continuance of the said term
to insure and keep insured the plant and buildings (except a warehouse of
approximately 8,400 square feet accommodation situated on the licensed premises
and which is the property of the Licensor) erected on the licensed premises and
all other approved works in connection therewith against the risk of loss or
damage by fire explosion aircraft riot and malicious damage in a sum equal to
the full value thereof for the time being and public liability to a limit of
indemnity to be agreed by the Licensor in some insurance office or offices of
repute and to pay all premiums necessary for effecting and maintaining such
insurances provided always that the conduct and control of all claims arising
under the indemnity granted in this clause shall be vested in the Licensee

(10) Not at any time during the said term hereby granted to use or occupy the
licensed premises or any part thereof for any purpose other than the manufacture
and distribution of Carbide Mixtures, the receipt and storage of raw materials
required for the manufacture of Carbide Mixtures and the repacking and the
despatch of calcium carbide or Carbide Mixtures or such other activities as are
carried out from time to time with the prior consent of the Licensor which
consent not to be unreasonably withheld.

(11) Not at any time during the said term hereby granted to sell assign or
transfer underlet make over or part with or share the possession or the
occupation of the licensed premises or any partthereof except to BOC
International Limited or its subsidiaries or associates without the written
consent of the Licensor which consent is not to be unreasonably withheld.



                                        3







(12) If as provided in Clause 1 hereof the Licensee shall terminate this
Licensing Agreement on 31 December 1982, or any anniversary thereof prior to the
expiry of [                        ] from the Effective Date as defined in the 
said Managing Agents Agreement the Licensee shall pay to the Licensor by way of
compensation a sum equivalent to [                      ] the yearly payment 
(or such other payment as may be mutually agreed or determined in accordance
with the provisions of Clause 4 hereof) which has been payable during the twelve
months immediately prior to the expiry of the notice of termination subject
always to the provision that if the Licensee shall terminate the Licensing
Agreement during the period commencing [         ] prior to the twentieth
anniversary of the Effective Date and terminating on the twentieth
anniversary of the Effective Date then the Licensee shall pay to the Licensor by
way of compensation a sum equivalent to the [                       ] payment 
that would have been paid between the termination date and the twentieth
anniversary of the Effective Date had this Licensing Agreement not been
terminated by the Licensee.

(13) At the expiration or sooner termination of the said term hereby granted
peaceably and quietly to yield up to the Licensor the licensed premises and
within nine months immediately following the date of termination unless
otherwise agreed with the Licensor in writing to remove at the cost of the
Licensee all plant and buildings and appliances and services existing thereon or
laid in connection therewith and to reinstate and make good the licensed
premises to the reasonable satisfaction of the Licensor, the Licensee during
such nine months or lesser period paying to the Licensor [
                                                                             ]

(14) Any persons visiting the licensed premises in connection with the business
of the Licensee shall conform to the rules set from time to time by the Licensor
and other responsible officials and authorities for proper conduct of the site
which has multiple occupation

3.   The Licensor hereby covenants with the Licensee:

(1) That the Licensee making the said yearly and other payments hereby reserved
and performing and observing the covenants conditions or agreements herein
contained shall peaceably and quietly hold and enjoy the licensed premises
during the said term hereby granted without any interruption or disturbance from
or by the Licensor or any person or persons claiming under or in trust for them.

(2) To carry out at the reasonable cost and to the reasonable satisfaction of
the Licensee either themselves or by their sub-contractors all works required in
connection with the modification of or additions to the Althorpe services as
provided for in Clause 1 (a) hereof

(3) To provide without charge to the Licensee access roads from public roadways
to the Licensed premises that are suitable to enable the Licensee and all
persons authorised by them to construct, operate and maintain the facility for
manufacture and distribution of Carbide Mixtures and to conduct the business of
the facilities.


                                        4





4. The Parties shall meet [             ] prior to the [              ] 
anniversary of the Effective Date to review the yearly payment of [            ]
 and to agree what if any adjustment may be necessary to such payment having 
particular regard to any change that may have occurred up to that time or 
thereabouts in the appropriate index figure. Such appropriate index figure shall
be the [                                                                       ]
If such index be discontinued during the continuance of the Agreement then the
Index replacing it will be used and the figure of [        ] for June 1979 will 
be adjusted to such figure as will give as near as reasonably possible the like
comparison on the basis of the information available as to the relationship
between the indices.

5. For the avoidance of doubt it is agreed by the Parties that all buildings
appliances plant or other constructions erected on the licensed premises (except
for a warehouse of approximately 8,400 square feet accommodation situated on the
licensed premises and which is the property of the Licensor) shall not become
annexed to the said licensed premises and shall be the property of the Licensee
or their contractors.

6. In the case of any dispute or difference arising between the Parties as to
the construction of this Licensing Agreement or the rights duties or obligations
of either party hereunder or any matter arising out of or concerning the same
every such dispute or matter of difference shall be referred to a single
arbitrator in case the Parties can agree upon one otherwise to some person
appointed by the President for the time being of the London Chamber of Commerce
and in either case in accordance with and subject to the provisions of the
Arbitration Act 1950 or any Statutory Modification or Reenactment thereof for
the time being in force.

7. Either Party shall be entitled to terminate this Agreement either in whole or
in part by notice in writing given by that Party to the other at any time if the
other Party shall have passed a Resolution providing for their liquidation
except for the purposes of reconstruction or amalgamation or if a receiver shall
be appointed of any of their assets or if circumstances shall have arisen which
shall entitle any person to appoint a receiver.

8. It is hereby agreed that a Licensing Agreement dated 2 July 1973 between the
Parties shall with effect from the 1st day of October 1979 cease to be of any
further force and effect except insofar as relating to liabilities incurred or
obligations outstanding by either Party at such date.

9. In entering into this Licensing Agreement, the Parties have agreed that,
subject to the provisions of Clause 1, the Agreement shall continue in full
force and effect until the expiry of from twenty years the Effective Date. If
the Licensee should wish to extend the Licence Agreementbeyond that date or
alternatively to enter into a new Licensing Agreement with the Licensor, the
Parties agree that they will in good faith endeavour to negotiate equitable
terms for such extension or new Agreement.

AS WITNESS WHEREOF



                                        5





The Parties have executed this Agreement the day and year first above written

Signed by /s/                                 Director
          -----------------------------------


          /s/                                 Secretary
          -----------------------------------
         For and on behalf of Gunness Wharf Limited

Signed by /s/
          -----------------------------------
        For and on behalf of BOC Limited


In the presence of /s/
                   --------------------------


                                        6





ADDENDUM

TO LICENSING AGREEMENT - CLAUSE 4

With effect from 1st February 1990 the yearly payment will be [             ]

The parties shall meet 12 months prior to the fifteenth anniversary of the
effective date, that being during January 1994 to review and agree terms for a
further five year period and at this time Licensee (B.O.C. Ltd.) shall have the
right to give one year's termination of contract if terms cannot mutually be
agreed subject to compensatory payments to the licenser, Gunness Wharf Limited
provided for in Clause 2 (paragraph 12).

                                           B.O.C.

DATE:                 1-9-89               DATE:             15-9-89

SIGNATURE:            /s/                  SIGNATURE:        /s/
                         -------------                       ----------------


For and on behalf of:-                             For and on behalf of:-

GUNNESS WHARF LIMITED                     BOC LTD -
                                          Carbide Industries




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