In order to enable the Legislature to perform the duties set forth in the foregoing Section, it is hereby declared all lands and other property heretofore set apart and appropriated for the establishment and maintenance of the University of Texas, together with all the proceeds of sales of the same, heretofore made or hereafter to be made, and all grants, donations and appropriations that may hereafter be made by the State of Texas, or from any other source, except donations limited to specific purposes, shall constitute and become a Permanent University Fund. And the same as realized and received into the Treasury of the State (together with such sums belonging to the Fund, as may now be in the Treasury), shall be invested in bonds of the United States, the State of Texas, or counties of said State, or in School Bonds of† municipalities, or in bonds of any city of this State, or in bonds issued under and by virtue of the Federal Farm Loan Act approved by the President of the United States, July 17, 1916, and amendments thereto; and the interest accruing thereon shall be subject to appropriation by the Legislature to accomplish the purpose declared in the foregoing Section; provided, that the one-tenth of the alternate Sections† of the lands granted to railroads, reserved by the State, which were set apart and appropriated to the establishment of the University of Texas, by an Act of the Legislature of February 11, 1858, entitled, “An Act to establish the University of Texas”, shall not be included in, or constitute a part of, the Permanent University Fund.