In counties with a population of not less than sixteen thousand, six hundred (16,600) and not more than seventeen thousand, sixty (17,060); and in counties having a population of not less than thirty-eight thousand, seven hundred and sixty (38,760) inhabitants and not more than thirty-eight thousand, seven hundred and eighty (38,780) inhabitants; and in counties having a population of not less than twenty-six thousand, three hundred and eighty-two (26,382) and not more than twenty-six thousand, four hundred (26,400) inhabitants; and in counties having a population of not less than twenty-three thousand, six hundred and sixty-nine (23,669) nor more than twenty-three thousand, seven hundred and seventy-five (23,775) inhabitants; and in counties having a population of not less than nineteen thousand, one hundred and seventy-three (19,173) nor more than nineteen thousand, one hundred and eighty-three (19,183) inhabitants; and in counties having a population of not less than seventeen thousand, five hundred and sixty-five (17,565) nor more than seventeen thousand, five hundred and eighty-five (17,585) inhabitants; and in counties having a population of not less than forty-eight thousand, five hundred and eighteen (48,518) nor more than forty-eight thousand, five hundred and thirty-eight (48,538) inhabitants; and in counties having a population of not less than fifty-three thousand, nine hundred and twenty-five (53,925) nor more than fifty-three thousand, nine hundred and forty-seven (53,947) inhabitants; and in counties having a population of not less than thirty-three thousand, three hundred and seven (33,307) nor more than thirty-three thousand, three hundred and twenty-eight (33,328) inhabitants; and in counties having a population of not less than thirty-one thousand, three hundred and ninety-five (31,395) nor more than thirty-one thousand, four hundred (31,400) inhabitants; and in counties having a population of not less than fourteen thousand, nine hundred and ten (14,910) nor more than fourteen thousand, nine hundred and seventeen (14,917) inhabitants; and in counties having a population of not less than eight thousand, six hundred (8,600) nor more than eight thousand, six hundred and ten (8,610) inhabitants; and in counties having a population of not less than five thousand, six hundred and sixty-five (5,665) nor more than five thousand, six hundred and seventy (5,670) inhabitants; and in counties having a population of not less than twelve thousand, one hundred and eighty-five (12,185) nor more than twelve thousand, one hundred and ninety (12,190) inhabitants; and in counties having a population of not less than five thousand, five hundred and eighty-five (5,585) nor more than five thousand, five hundred and eighty-nine (5,589) inhabitants; and in counties having a population of not less than forty-one thousand, twenty (41,020) nor more than forty-one thousand, thirty (41,030) inhabitants; and in counties having a population of not less than forty-three thousand, thirty-five (43,035) nor more than forty-three thousand, forty (43,040) inhabitants; and in counties having a population of not less than twenty thousand, one hundred (20,100) nor more than twenty thousand, one hundred and fifty (20,150) inhabitants; and in counties having a population of not less than nine thousand, twenty-five (9,025) nor more than nine thousand, fifty (9,050) inhabitants; and in counties having a population of not less than thirty-nine thousand, one hundred (39,100) and not more than thirty-nine thousand, one hundred and ten (39,110) inhabitants; and in counties having a population of not less than twelve thousand, three hundred and seventy (12,370) nor more than twelve thousand, three hundred and eighty (12,380) inhabitants; and in counties having a population of not less than thirteen thousand, five hundred and seventy (13,570) and not more than thirteen thousand, five hundred and eighty (13,580) inhabitants; and in counties having a population of not less than thirty-four thousand, one hundred and fifty-five (34,155) nor more than thirty-four thousand, one hundred and sixty (34,160) inhabitants; and in counties having a population of not less than twelve thousand, seven hundred and eighty-five (12,785) nor more than twelve thousand, seven hundred and ninety (12,790) inhabitants; and in counties having a population of not less than nineteen thousand, three hundred and twenty (19,320) nor more than nineteen thousand, three hundred and twenty-five (19,325) inhabitants; and in counties having a population of not less than fourteen thousand, one hundred and eighty (14,180) nor more than fourteen thousand, one hundred and eighty-five (14,185) inhabitants; and in counties having a population of not less than twenty-four thousand, two hundred and thirty (24,230) nor more than twenty-four thousand, two hundred and thirty-five (24,235) inhabitants; and in counties having a population of not less than six thousand, six hundred and ninety-five (6,695) nor more than six thousand, seven hundred (6,700) inhabitants; and in counties having a population of not less than sixteen thousand, five hundred and sixty (16,560) nor more than sixteen thousand, five hundred and sixty-five (16,565) inhabitants; and in counties having a population of not less than five thousand, two hundred and fifty (5,250) nor more than five thousand, two hundred and fifty-five (5,255) inhabitants; and in counties having a population of not less than sixteen thousand, six hundred and sixty-five (16,665) nor more than sixteen thousand, six hundred and seventy (16,670) inhabitants; and in counties having a population of not less than twelve thousand, three hundred and sixty (12,360) nor more than twelve thousand, four hundred and twenty (12,420) inhabitants; and in counties having a population of not less than thirteen thousand, five hundred and sixty (13,560) nor more than thirteen thousand, five hundred and eighty-five (13,585) inhabitants; and in counties having a population of not less than eight thousand, five hundred and ninety (8,590) nor more than eight thousand, eight hundred and ninety (8,890) inhabitants; and in counties having a population of not less than nine thousand, two hundred and ninety (9,290) and not more than nine thousand, four hundred (9,400) inhabitants; and in counties having a population of not less than six thousand, eight hundred (6,800) and not more than six thousand, eight hundred and thirty (6,830) inhabitants; and in counties having a population of not less than seventeen thousand, four hundred and forty-five (17,445) and not more than seventeen thousand, four hundred and sixty-five (17,465) inhabitants; and in counties having a population of not less than eleven thousand, twenty-one (11,021) and not more than eleven thousand, fifty (11,050) inhabitants; and in counties having a population of not less than sixteen thousand, twenty (16,020) and not more than sixteen thousand, five hundred (16,500) inhabitants according to the last Federal Census in each instance, the County Boards of Trustees may make such provisions as they deem necessary for office and/or traveling expenses of the County Superintendent of Public Instruction, and any assistant he may have; provided that the amount of such expenditures for such necessary office and/or traveling expenses shall not exceed the sum of Six Hundred Dollars ($600) per annum. The amount of such expenses so allowed shall be paid in the manner and in accordance with now existing laws governing the maintenance of the office of the County Superintendent of Public Instruction.