f inspector of mines, or the district
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.

[=Three rings or whistles.=] Three rings or whistles shall signify
that men are coming up; when return signal is received from the
engineer, men will get on the cage, and cager shall ring or whistle
one to start.

[=Four rings or whistles.=] Four rings or whistles shall signify to
hoist slowly, implying danger.

[=Five rings or whistles.=] Five rings or whistles shall signify
accident in the mine and a call for a stretcher.

=From the Top to the Bottom.=

[=One ring or whistle.=] One ring or whistle from the top to the
bottom shall signify: All ready, get on cage.

[=Two rings or whistles.=] Two rings or whistles shall signify: Send
away empty cage.

[=Addition to code, when allowed; code must be posted at top and
bottom.=] Provided, that the management of any mine, may, with the
consent of the district inspector of mines, add to this code of
signals in his discretion, for the purpose of increasing its
efficiency, or of promoting the safety of the men in said mine, but
whatever code may be established and in use at any mine must be
furnished by the mining department, conspicuously posted at the top
and at the bottom and in the engine room, for the information and
instruction of all persons concerned.

[=Emergency signal in shafts.=] At each mine where persons are
hoisted in a vertical shaft, an emergency signal shall be provided
in such manner that persons can give signals from the cage, in the
event that cage is stopped between the top and bottom landings.
(Sec. 929; Penalty, Sec. 976.)

Sec. 943. [=Light