Sec. 2. In making the annual per capita apportionment to the public free schools, the County Board of Education of each of the counties mentioned in Section 1 of this Act shall also make an annual allowance out of the State and County Available School Funds not exceeding the sum of Six Hundred Dollars ($600) salary 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 said county may expend out of the General Fund of said counties not to exceed Three Hundred Dollars ($300) per annum to defray the office expenses for stamps, stationery, telephone, etc., incidental to and necessary in the efficient administration of the schools of said counties respectively.