AGREEMENT FOR THE
		 SECOND AMENDMENT TO A LEASE
			     
     On this third day of July, 1996, it is hereby agreed by and between  
HILLCREST DEVELOPMENT, a Minnesota limited partnership, as Lessor, and 
R & D SYSTEMS, INC., a Minnesota corporation, as Tenant, that the Lease 
Agreement dated  July 24, 1992, and the letters of Agreement dated April 27, 
1993, June 22, 1993, January 17, 1995, February 17, 1995, June 15, 1995,  
August 18, 1995, September 11, 1995 and the Agreement for the First Amendment 
to a Lease dated October 27, 1995 (collectively, the "Lease"), shall be 
amended as follows:

      1.  The  Lease  Term as set forth in 1.B. is hereby extended through 
December 31, 2013.

      2.  The net rent payable pursuant to Section 1.C. and D.1. for the 
period commencing January 1, 2012 and expiring on December 31, 2013 shall be 
annually increased at a rate of four percent (4%) per year over the prior 
calendar year's net rent for each year during such period with the rent for
the Calendar year 2012 being equal to one hundred four percent (104%) of the 
stated net rent for the calendar year 2011.

      3.  Lessor hereby grants Tenant a construction allowance of $388,370.00 
which Tenant may utilize during the term of this Lease for desired leasehold 
improvements.  Such allowance or portions shall be paid to Tenant upon 
submission to Lessor of evidence of payment of all work comprising the 
leasehold improvements and evidence that all potential lien claimants have 
provided lien waivers.

      4.  The lease paragraph "Limited Option to Purchase the Leased Premises" 
contained in paragraph 15 of the Agreement for the First Amendment to a Lease 
dated October 27, 1995 is amended by replacing the second sentence thereof  
with the following:

	   "This option may only be exercisable by Tenant by written notice 
      to Lessor given after December 31, 2004 and prior to January 1, 2010."

      5.  Except as provided for above, all remaining terms and conditions of 
the Lease shall remain in full force and effect.

LESSOR:                                 TENANT:
HILLCREST DEVELOPMENT                   R & D SYSTEMS, INC.
						      
By:  Scott M. Tankenoff                 By:  Thomas E. Oland
     Its General Partner                     Its President

Data:   July 3, 1996                    Date:  July 3, 1996


				CONSENT
			      
      The undersigned, Guarantor of Tenant's obligations under the Lease, 
hereby consents to the foregoing Agreement for the Second Amendment to a 
Lease.

					TECHNE CORPORATION

					By:  Thomas E. Oland
					Its:  President
					Date:  July 3, 1996