Section 1. Be it enacted, &c., That whenever, after the passage of this act, any regiment or battery or other unit of military organization of Pennsylvania Volunteers shall publish, or shall have prepared for publication, a history of such organization, under the sanction and authority of its proper veteran organization, which history shall be shown, to the satisfaction of the Governor, Auditor General, and Adjutant General, so far as it is practicable in such works, faithfully and accurately prepared and historically correct to be of sufficient reliability and importance to justify the purchase of copies as herein provided for, and to contain a complete roster of the organization, corrected to the date of publication, the Secretary of the Commonwealth, with the approval of the Governor, Auditor General, and Adjutant General, and at a price fixed by them, shall purchase four hundred copies of such history, the price not to exceed two dollars per copy: Provided, That the total amount expended during the two fiscal years beginning June first, one thousand nine hundred and seven, shall not exceed the sum of eight thousand dollars. The said appropriation to be paid upon warrants drawn by the Secretary of the Commonwealth, countersigned by the Auditor General, and that the State Treasurer of this Commonwealth be and is authorized to make all payments out of such moneys in the Treasury as is not otherwise appropriated.