Whenever it is necessary for a sheriff or sergeant to pay for the board and lodging of juries, he shall obtain a receipt for the funds so spent and on or before the fifth day of the month next succeeding he shall present such bill to the board of supervisors or other governing body of the county or to the city council, as the case may be, which shall, if it is found correct, reimburse the sheriff or sergeant for the amount so spent by him for such purpose. The county or city shall be reimbursed by the Commonwealth for all sums so expended on account of any criminal trial involving an offense against the Commonwealth.