SECTION 7. The boards of inspectors of the State penitentiaries, and of the Pennsylvania Industrial Reformatory at Huntingdon, upon the request of a board of managers of a State industrial farm, are hereby authorized to transfer to such State industrial farm from their respective institutions any prisoners of special or mechanical ability therein who may be found in the judgment of such board and the board of managers of such State industrial farm suitable for the purpose, and provide transportation and proper guards for such prisoners and while such prisoners remain at such State industrial farm they shall be subject to the orders of the inspectors of the institution from which they were transferred as to their return, and in all other respect, except as to discipline and government. While at such State industrial farm they shall be under the control, discipline, and government, and subject to the orders, of the board of managers of such State industrial farm and its executive officers. The expense of transporting and transferring prisoners used in the construction of buildings and equipment to and from any State industrial farm shall be paid by the State Treasurer upon the warrant of the Auditor General out of any moneys appropriated for the establishment of such State industrial farm. The Auditor General shall issue warrants for such purpose upon the order of the executive officers of the board of managers of such State industrial farm. The maintenance of such prisoners as are transferred from a State penitentiary or reformatory shall be paid by the institution from which they are transferred, but the cost of such maintenance in excess of the average per capita cost of maintaining prisoners at the institution from which such prisoners shall have been transferred shall be refunded to any such institution out of any moneys appropriated for the establishment of the State industrial farm. SECTION 8. When any State industrial farm shall have been established and ready for operation, a superintendent and matron and such other officers as may be deemed necessary shall be appointed by the proper board of managers. Any persons so appointed shall hold their offices respectively during the pleasure of the board of managers. The compensation of all such persons shall be fixed by the board of managers.