A Supplement to the act of July 28, 1966 (3rd Sp. Sess., P. L. 87, No. 3), entitled "An act providing for the establishment and operation of the University of Pittsburgh as an instrumentality of the Commonwealth to serve as a State-related university in the higher education system of the Commonwealth; * * *," making appropriations for carrying the same into effect; providing for a basis for payments of such appropriations; and providing a method of accounting for the funds appropriated.