Section 3. The sum of seven hundred and seventy-one dollars, or so much thereof as may be necessary, be and the same is hereby specifically appropriated, to cover such expenditures as may be necessary to supply the Senators and Representatives of the session of one thousand nine hundred and eleven with the certificates hereinbefore provided for: one hundred and ninety- two dollars and seventy-five cents, for the use of the Senate; and five hundred and seventy-eight dollars and twenty-five cents, for the use of the House of Representatives. The necessary expenditures shall be paid by the State Treasurer on warrants of the Auditor General, upon the presentation of vouchers approved by the President pro tempore of the Senate and the Speaker of the House of Representatives, respectively.