Section 1. On and after the effective date of this act, the Secretary of Mines, with the consent of the Governor, shall appoint three first-aid and three mine rescue instructors to carry on the work of instructing mine employes how to care for persons injured in and about the coal mines of this Commonwealth, and to train such other employes of the various coal companies who may voluntarily seek training in the use of self-contained breathing apparatus, gas masks, first-aid to the injured and such other things or practices essential to the safe and efficient conduct of the work of first-aid and mine rescue.