careful to keep his working place in a safe condition at all times.
(Sec. 952.)


[=Shall cease work when place is dangerous.=] Should he at any time
find his place becoming dangerous from any cause or condition, he
shall at once cease work, and notify the mine-foreman, or assistant
mine-foreman, of such danger, and, upon leaving such place, he shall
place some plain warning at the entrance thereto, to warn others
from entering into the danger, and shall not return until ordered to
do so by the mine-foreman, or assistant mine-foreman. (Sec. 953.)


[=Shall prop roof, etc.=] Each miner, or other person employed in a
mine, shall securely prop the roof of the working place therein
under his control, and shall obey any order, or orders, given by the
superintendent or mine-foreman relating to the width of working
places, and to the security of the mine in the part thereof where he
is at work, and for fifteen feet back from the face of his working
place. Such miner, or other person, shall not be held to have
violated the provisions of this clause if the owner, lessee or agent
fails to supply the necessary props, caps, and timbers, as provided
for in this act. (Sec. 933, 953.)


[=Shall not waste props, etc.=] Each miner, or other person shall
avoid waste of props, caps, timber, or other material. When he has
props, caps, timber, or other material unsuited for his purpose, he
shall not cover up or destroy same, but shall place it near the
track where it can be readily seen. (Sec. 933, 953.)