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