72 Pa. Stat. § 3692
The Sinking Fund Commissioners are hereby authorized and directed to invest the said five hundred thousand dollars in said fund in such securities as the said Sinking Fund Commissioners are authorized to invest the funds of the Commonwealth, and pay the interest or income therefrom, semiannually on the first day of February and August of each year, to Pennsylvania State College,--said Pennsylvania State College being such a college as meets the requirements of the act of Congress of eighteen hundred and sixty-two, under which this appropriation was made to the State of Pennsylvania by the United States Government: Provided, nevertheless, That any difference between the amount of the interest or income realized by the said Sinking Fund Commission on such investments and the sum of twenty-five thousand dollars, the latter being five per cent. of the total amount of such fund, which Pennsylvania guaranteed said fund shall yield annually, shall be paid by the Commonwealth of Pennsylvania from appropriations made for this purpose from time to time.
72 P.S. § 3692