Cusip 881584106
Item 1:  Reporting Person: Arnhold and S. Bleichroeder, Inc. (Tax ID: 134959915)
Item 4:  State of New York
Item 5:  1,097,100 *
Item 6:  None
Item 7:  1,097,100 *
Item 8:  None
Item 9:  1,097,100 *
Item 11: 7.84% *
Item 12: BD

* Includes the 621,700 shares of Common Stock to which Arnhold and S. 
  Bleichroeder, Inc. expressly disclaims beneficial ownership (See Item 4 (a) 
  below).


Cusip 881584106
Schedule 13 G (Cont.)                        

Item 1(a)-  Name of Issuer: Tescorp, Inc.

Item 1(b)-  Address of Issuer's Principal Executive Offices:

                  327 Congress Avenue, Ste 200
                  Austin, TX 78701

Item 2(a)-  Name of Person Filing: Arnhold and S. Bleichroeder, Inc.


Item 2(b)-  Address of Principal Business Office:    1345 Ave of Americas
                                                     New York, NY 10105

Item 2(c)-  Citizenship: New York, NY, USA (Place of Incorporation)

Item 2(d)-  Title of Class of Securities:      Common Stock

Item 2(e)- Cusip Number: 881584106

Item     3-This  statement is being filed pursuant to Rule 13d-1(b).  The person
         filing is a : (a) Broker or Dealer  registered  under Section 15 of the
         act; and  (e)-Investment  Advisor  registered  under Section 203 of the
         Investment Advisors Act of 1940.

Item 4(a) Amount  beneficially  owned:  As of December 31, 1996,  Arnhold and S.
Bleichroeder,  Inc. held an aggregate of 475,400 shares of Common Stock directly
for its own account.  Such shares  include:  (i) 283,800  shares  issuable  upon
exercise of a Stock Purchase  Warrant,  dated as of May 5, 1995,  exercisable at
any time and from time to time, on or prior to May 5, 2000, at an exercise price
of $2.00 per share  (subject to certain  adjustments);  and (ii) 165,600  shares
issuable  upon  exercise of a Stock  Purchase  Warrant  dated as of December 21,
1995, exercisable at any time and from time to time, on or prior to December 21,
2000, at an exercise price of $3.125 per share (subject to certain adjustments).

In  addition,  Arnhold and S.  Bleichroeder,  Inc.  ("A & SB) is the  investment
advisor for a number of investment  companies  (each a "Fund").  Pursuant to its
advisory  agreement with each Fund, A & SB has sole power to vote and dispose of
the securities held by each Fund and is therefore deemed the beneficial  owner, 
for the purposes of Rule 13d-3,  of the securities  held by the Fund. A & SB may
also be considered  the  beneficial  owner,  for  the  purposes  of Rule  13d-3,
of the securities held in  discretionary  accounts (the  "Discretionary  
Accounts") for which A & SB acts as  investment  advisor.  A & SB has  sole  
power to vote and dispose of the securities in each Discretionary Account. An 
aggregate of 621,700 shares of Common







Cusip   378507503
Schedule G (Cont.)                                

Stock are held by such Funds and in such  Discretionary  Accounts.  Such  shares
include an aggregate of 536,000 shares  issuable upon conversion of an aggregate
of 16,750 shares of 1995 Preferred Stock.

Pursuant to Rule 13b-4 promulgated  under the Act, Arnhold and S.  Bleichroeder,
Inc. expressly  disclaims  beneficial  ownership of the 621,700 shares of Common
Stock held by such Funds and in such Discretionary Accounts.

 A & SB's decisions  regarding  voting and disposing of the  securities  held in
each  fund  and in each Discretionary  Account,  depending  upon  the  relevant
investment  objectives  and other  factors.  A & SB disclaims  the existence of 
a "group" among itself, the Funds and the Discretionary  Accounts for the 
purposes of Sections 13(d) and 13(g) of the Act.

Item 4(b) - Percent of Class: 7.84% *

Item 4(c)- Number of Shares to which A & SB has:
         (i)--sole power to vote or to direct the vote:              1,097,100 *
         (ii)-shared power to vote or to direct the vote:                -0-
         (iii)sole power to dispose or to direct the disposition of: 1,097,100 *
         (iv)-shared power to dispose or to direct the disposition of    -0-

*Includes  the  621,700   shares  of  Common  Stock  to  which  Arnhold  and  S.
Bleichroeder,  Inc.  expressly  disclaims  beneficial  ownership (See Item 4(a)
above).

Item 5   -  Ownership of Five Percent or Less of a Class:  Not Applicable
            --------------------------------------------

Item 6   -  Ownership of More than Five percent on Behalf of Another Person:
            ----------------------------------------------------------------

         See Item 4(a) above.

Item 7-Identification  and  Classification  of the Subsidiary Which Acquired
         the Security Being Reported on By the Parent Holding Company:

         Not Applicable

Item 8-Identification and Classification of Members of the Group:

         Not Applicable










Cusip   879075109
Schedule G (Cont.)                                


Item 9-Notice of Dissolution of Group:

         Not Applicable

Item 10  -  Certification:

            By signing  below I certify  that,  to the best of my knowledge  and
            belief,  the  securities  referred  to above  were  acquired  in the
            ordinary course of business and were not acquired for the purpose of
            and do not have the effect of changing or influencing the control of
            the issuer of such  securities  and were not acquired in  connection
            with or as a participant in any transaction  having such purposes or
            effect.



                                    SIGNATURE

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

            Date: February 13, 1997

         ARNHOLD AND S. BLEICHROEDER, INC.


         By:      /S/ Ronald A. Bendelius
                 --------------------------------
                  Ronald A. Bendelius
                  Senior Vice President


         By:      /S/ Charles J. Rodriguez
                 -------------------------------
                  Charles J. Rodriguez
                  Senior Vice President