inspector of mines, for the protection of those employed in
operating same. (Sec. 957; Penalty, Sec. 976.)



=SIGNAL CODE.=


Sec. 942. [=Signals at mines, how conducted; devices to be used.=]
At each mine operated by shaft, the means of signaling to and from
the bottom man, the top man, and the engineer shall consist of a
tube, or tubes, or wire encased in wood or iron pipes, through which
signals shall be communicated by electricity, compressed air, or
other devices. The following signals are provided for use at mines
where signals are required:


=SIGNAL CODE.=


=From the Bottom to the Top.=


[=One ring or whistle.=] One ring or whistle from the bottom to the
top shall signify to hoist coal or the empty cage, and also to stop
either when in motion.


[=Two rings or whistles.=] Two rings or whistles shall signify to
lower cage.