Sec. 2. ALLOWANCE OUT OF STATE AND COUNTY AVAILABLE SCHOOL FUND; PRORATION OF ALLOWANCE. In making the annual per capita apportionment to the public free schools, the County Board of Education of each of the several counties mentioned in Section 1 of this Act shall also make an annual allowance out of the State and County Available School Fund not exceeding the sum of Three Thousand ($3,000.00) Dollars for the salary of the County Superintendent of Public Instruction and Six Hundred ($600.00) Dollars for traveling expenses incidental to and necessary in the administration of the County Superintendent's office annually, and the same shall be prorated to the schools in said county in proportion to the scholastic population of each school district in each of said respective counties, and the Commissioners' Court of each of said counties may expend out of the General Fund of said counties not to exceed Three Hundred ($300.00) Dollars per annum to defray the office expenses for stamps, stationery, telephone, and printing, incidental to and necessary in the efficient administration of the schools of said counties respectively.