In all counties in Texas having a population of not less than one hundred and thirty thousand (130,000) and not more than one hundred and thirty-three thousand (133,000), according to the last preceding Federal Census, the County School Trustees shall hold meetings once each month on the first Monday of each month, or as soon thereafter as practicable, or at such other times when called by the President of the Board of County School Trustees or at the instance of any three (3) members of said Board and the County Superintendent; the meeting place to be at the County Courthouse and in the office of the County Superintendent, or at such other place in the County Courthouse as may be designed by the President of said Board of County School Trustees. Each County School Trustee shall be paid Six Dollars ($6) per day for the time spent in attending said meetings, not exceeding twenty-four (24) days in any one year. Such compensation shall be paid out of the school administration fund of said county by warrants drawn against such fund as the law now provides, after the approval of this Act.