passage and approval of this act, shall be located not nearer than one hundred and fifty feet of any opening to the mine used as a means of ingress or egress. (Sec. 955, 960; Penalty, Sec. 976.) Sec. 946. [=Relating to use of gasoline in mines.=] No gasoline, naphtha or kerosene engine shall be used in a mine, except for operating pumping machinery where electric, compressed air or steam power is not available or cannot be transmitted to the pump, and then the owner, lessee or agent shall observe the following: Notice shall be made to the chief inspector of mines before installing, and the installation and operation shall be subject to his approval: No wood or inflammable material shall be permitted nearer than twenty-five feet of the engine: The supply tank from which the gasoline, naphtha or kerosene is fed to the engine, shall be of metal, with a suitable screw cap opening, fitted with a gasket, so as to make the tank air-tight and prevent the escape of gas into the atmosphere, and the tank kept free from leaks: the gasoline, naphtha or kerosene shall be fed from a tank to the carburetor or mixer by metal tubes securely connected so as to reduce the possibility of leaks to a minimum: The exhaust from the engine shall be conducted by means of metal pipes into the return air current, so that the fumes of combustion will not enter the workings of the mine where the men are required to work, or be conducted in an upcast shaft or slope not used as a means of ingress or egress, or through metal pipes to the surface: At no time shall there be more than five gallons of gasoline, naphtha or kerosene in the supply tank; at no time shall more than five gallons of same be taken into the mine at any one time, and at no time shall there be more than ten gallons in the mine, including that in the supply tank: No gasoline, naphtha or kerosene shall be taken into the mine except in metallic cans, with a screw cap opening at the top, fitted with a suitable gasket: No package or can, or the supply tank of an engine, containing gasoline, naphtha or kerosene, shall be opened until ready to make the transfer from the package or can to the supply tank, and in transferring, a funnel shall be used so as to avoid spilling the gasoline, naphtha or kerosene, and the cap on the supply tank shall be immediately closed: In no case shall the package, can, or the supply tank, be opened, with any open light or other thing containing fire within twenty-five feet of same. (Penalty, Sec. 976.) Sec. 947. [=Relating to use of electricity in mines.=] The owner, lessee or agent of a mine in which electricity is used as a means of power, shall observe the following in the application thereof: