The lands and moneys described in s. 24.79, not being granted for any other specified purpose, accrue to the school fund under article X, section 2, of the constitution; and having been found unnecessary for the support and maintenance of common schools, are appropriated to the support and maintenance of state universities and suitable libraries and apparatus therefor, and to that end are set apart and denominated the “Normal School Fund”. All lands, moneys, loans, investments and securities set apart to the normal school fund and all swamp lands and income and interest received on account of the capital of that fund constitute a separate and perpetual fund. Normal school fund income, interest and revenues do not include expenses deducted from gross receipts permitted under ss. 24.04 (2), 24.53 and 24.62 (1).