EXHIBIT 10.8.5


                        THIRD AMENDMENT TO
                      LINDE DATA CENTER LEASE


     THIS AMENDMENT, made as of June 30, 1994, between UNION 
CARBIDE CORPORATION (formerly known as UNION CARBIDE CHEMICALS AND 
PLASTICS COMPANY INC.), a New York corporation having offices at 39 
Old Ridgebury Road, Danbury, Connecticut  06817
("Landlord"), and PRAXAIR, INC. (formerly known as UNION CARBIDE 
INDUSTRIAL GASES INC.), a Delaware corporation having offices at 39 
Old Ridgebury Road, Danbury, Connecticut  06817 ("Tenant"),
                      W I T N E S S E T H:
     WHEREAS, by Danbury lease Agreement dated as of January 1, 
1989, as modified by First Amendment to Linde Data Center Lease 
(Danbury) dated as of June 4, 1992 and Second Amendment to Linde 
Data Center Lease (Danbury) dated as of July 1, 1992 (collectively, 
the "Lease"), Landlord has leased to Tenant certain office space in 
the building known as Linde Data Center, Danbury, Connecticut, as 
more particularly identified in the Lease (the "Demised Premises"); 
and
     WHEREAS, Landlord is the tenant of Danbury Buildings, Inc. 
("Overlandlord"); and
     WHEREAS, the parties wish to amend the Lease to clarify the 
computation of the Base Rent and the Additional Rent;
     NOW, THEREFORE, in consideration of the Lease and the mutual 
undertakings set forth herein, Landlord and Tenant hereby amend the 
Lease effective as of July 1, 1992 as follows:


     1.     Section 3.02:     In Section 3.02 of the Lease, line 5, 
after "Term" insert" all in accordance with section 3.07"; and 
delete the second sentence.
     2.     Section 3.07:     Section 3.07 of the Lease shall be 
modified to read as follows:

            "3.07.     Landlord shall furnish to Tenant on or 
            about December 15 of each year a statement setting 
            forth (i) the estimated Operating Expenses and Taxes
            for the forthcoming Operational Year, and (ii) 
            Tenant's  Proportionate Share of any increase or 
            decrease in the total aggregate Operating Expenses and 
            Taxes for the Operational Year (computed on the basis 
            of such estimate) over the total aggregate Operating 
            Expenses and Taxes for the Base Year, viz., $11.56.  
            Tenant shall pay to Landlord, together with each 
            monthly installment of Base Rent, an amount equal to 
            one-twelfth (1/12th) of Tenant's Proportionate Share 
            of any increase in Operating Expenses and Taxes as so 
            estimated and Landlord shall issue to Tenant a monthly 
            credit applicable against the Base Rent equal to one-
            twelfth (1/12th) of Tenant's Proportionate Share of 
            any decrease in Operating Expenses and Taxes as so 
            estimated.  Landlord shall furnish to Tenant as soon 
            as practicable following the close of each Operational
            Year a detailed statement setting forth with respect 
            to such Operational Year (i) the actual amount of the 
            Operational Expenses and Taxes, and (ii) the actual 
            amount of Tenant's Proportionate Share of any total 
            aggregate increase or decrease in Operating Expenses 
            and Taxes, adjusted to reflect the payments on account 
            theretofore made by Tenant or credits received from 
            Landlord; and within thirty (30) days after receipt of 
            such statement, Tenant shall pay to Landlord the 
            amount so shown to be payable by Tenant.  The 
            Operating Expenses for any Operational Year which is 
            only partly within the Term shall be prorated.  
            Landlord shall refund to Tenant any overpayment of 
            Operating Expenses and taxes for any Operational Year 
            within thirty (30) days after presentation of 
            Landlord's statement of actual Operating Expenses and 
            Taxes or as soon as practicable after any termination 
            of this Lease.  As of August 1 of each Operational 
            Year, Landlord shall deliver to Tenant an estimate of 
            Operating Expenses and Taxes paid or incurred through 
            June 30 of such Operational Year."


     3.     Section 3.11:     Section 3.11 of the Lease shall be 
modified to read as follows:

            "3.11. On or before November 1 of any year, Tenant 
            shall have the right to assume or decline, for the 
            next succeeding Operational Year, responsibility for 
            the following categories of Operating Expenses: 
            cleaning services, in-building security, and such 
            other categories as may be mutually agreed upon by the 
            parties.  Tenant shall conform to reasonable standards 
            in performing any such work."
Landlord and Tenant hereby acknowledge that (i) for the 1994 
Operational Year, Tenant has duly assumed responsibility for 
cleaning and in-building security (as of August 1, 1994); (ii) 
administration expenses shall consist only of costs of 
administering the Prime Lease and Superior Mortgages as to the 
Building, Building maintenance and repairs, and Danbury Operating 
Emergency Center activities to the Building; and (iii) Landlord 
shall have the right from time to time to audit Tenant's cleaning 
activities at the Demised Premises against reasonable standards.
     4.     Section 3.12:     Delete Section 3.12 from the Lease.
     5.     Section 12.03 (New):     The following provision shall 
be added to the Lease:

            "12.03. Tenant shall have the right to use all 
            telecommunications and computer wiring in the Building 
            which now services the Demised Premises, to install 
            its own telephone switching equipment for the Demised 
            Premises in Landlord's N-O telephone room in the 
            Corporate Center located at 39 Old Ridgebury Road, 
            Danbury, Connecticut (the "Corporate Center"), and to 
            use the telecommunications cables located between (i) 
            Old Ridgebury Road and the Demised Premises, (ii) the 
            Demised Premises and the Corporate Center, and (iii) 
            the Corporate Center and Old Ridgebury Road.  Further, 
            Tenant shall have the right to repair and replace, or 
            cause to be repaired and replaced, any such 
            telecommunications and computer wiring, switching 
            equipment or cables.  Landlord shall cooperate fully 
            to permit Tenant to receive telecommunications service 


            at the Demised Premises." 
     6.     Tenant hereby acknowledges that Landlord is not 
required by the Lease and does not intend to seek the consent of 
Overlandlord with respect to this Amendment.
     7.     Landlord shall inform Tenant in advance of any 
modifications of the Prime Lease with Overlandlord and Landlord 
shall give to Tenant a reasonable opportunity to benefit from any 
transaction with Overlandlord reducing Landlord's payments to 
Overlandlord.  Tenant will take no benefit under the Lease from 
any decrease in Landlord's payments of Basic Rent, Additional Rent 
or other amounts to Overlandlord unless Tenant has contributed in 
a mutually agreed proportionate amount to the cost of obtaining 
any such decrease.  As used herein, "cost" shall include all costs 
and expenses incurred by Landlord and related to such reductions, 
whether paid to Overlandlord or to others, including but not 
limited to, prepayments of Basic Rent or Additional Rent and 
payment of transaction costs such as underwriting fees, legal 
fees, appraisal fees, survey fees, brokers' fees, or otherwise, of 
any nature whatsoever, whether similar or dissimilar to the 
foregoing.
     8.     All terms which are defined in the Lease shall have 
the same meaning when used herein.
     9.     Except as otherwise provided herein, the Lease shall 
remain in full force and effect.





     IN WITNESS WHEREOF, Landlord and Tenant have executed this 
Amendment by their duly authorized officers as of the day and year 
first above written.

                                        UNION CARBIDE CORPORATION

                                        By: Robert F.X. Fusaro 
                                            Attorney-in-Fact
                                        PRAXAIR, INC.

                                        By: David H. Chaifetz 
                                            Vice President