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Ohio, December 21, 1917.

[=Removal of combustible matter.=] Whenever an entry or air-way
becomes so dry that the air becomes charged with dust, the owner,
lessee or agent shall cause such entry or air-way to be sprinkled,
and all accumulated matter, explosive in its nature, shall be
removed from the mine. (Sec. 956.)

[=Quantity of oil in mine restricted.=] No oil shall be taken into
or stored in a mine except as may be required to be opened for use
within two days thereafter; and in no case shall more than two
barrels of oil be kept at any one place, and not more than ten
barrels of oil shall be had in a mine at any one time. All waste oil
and empty barrels shall be promptly removed from the mine. (Sec.
974, 975.)

[=Location of boilers at mine.=] The permanent boilers used for
generating steam, and the buildings containing the boilers, shall
not be nearer than sixty feet to any mine opening or to a building
or inflammable structure connected with or surrounding such opening.
(Penalty, Sec. 976.)

Sec. 945. [=Relating to underground stables.=] The owner, lessee or
agent of a coal mine at which the live stock is kept underground,
shall observe the following: The stable or stall shall be separated
from the main inlet and main outlet air-courses by not less than
twenty feet of solid strata or a solid wall of brick or masonry not
less than twelve inches in thickness, except at two doors not more
than five feet wide, which shall be made of steel plate not less
than one-quarter inch in thickness and hinged to the solid strata or
masonry without the use of wood; the ventilation for the stable
shall be taken from main inlet air-course by a by-pass or separate
split and returned to the main outlet air-course so that the air
passing the stables will not enter the inward working places of the
mine, and arranged so that the by-pass or split can readily be
closed at both inlet and outlet sides of the stable by steel doors
hinged to the solid strata or masonry without the use of wood; the
construction of the stable inside shall be free from pine or light
lumber; shall be of brick or masonry as much as practicable, and any
timber used shall be of hardwood of a cross section not less than
three by six inches; no hay or straw shall be taken into the mine or
stable unless same be compressed into compact bales, and then only
from time to time in such quantities as will be required for two
days' use; no greater quant