3262 ARTICLE 89

the mine is working, and during such further periods as the Bureau may
prescribe, unless written permission to stop such fan shall be given by the
district mine inspector; and before stopping such fan after such permis-
sion given, notice thereof shall be given every employee of the hours dur-
ing which stoppage is intended to continue, and work shall not be re-
sumed until such fan has run two hours continuously. Provided, that
should it at any time become emergently necessary to stop the fan because
of mechanical failure or other unavoidable cause, it shall first be the duty
of the mine foreman to provide for the safety of persons within such mine,
either by removing them or by furnishing temporary ventilation; but no
ventilating furnace shall be employed in such temporary emergency in a
gaseous mine. No principal fan shall be placed inside any mine; nor shall
an auxiliary fan be placed in any mine except under regulation of the
Bureau.

An. Code, 1924, sec. 104. 1922, ch. 307, sec. 103.

104. The operator shall, by the mine foreman or other competent per-
son, at least once every week in non-gaseous mines, and daily or as required
by the district mine inspector, in gaseous mines, when the men are work-
ing, measure the air current with a correct anemometer at or near the main
intake and outlet, and also in the last cut-through in the last room and in
the entry beyond the last room turned in each entry; and the air traveling
through pillars being drawn; and enter in a book kept for that purpose a
true report of all such air measurements, designating the place, the area
of each cut-through and entry separately, the velocity of the air in each
cut-through and entry and the number of men employed in each separate
split or district at the time the measurement was taken, with the date;
signed by the person taking the same; which record shall be kept in the
office at the mine, open to examination by the Bureau or by any person
employed in such mine. Once each month a report of the air pressure
average as shown by the pressure gauge upon the ventilating fan, the
daily air pressure during the principal shift, the air pressure by districts
and number of men and animals working in each district, the average air
circulation at the last cut-through and entry extension in such districts
and the lowest and highest air circulation observed at such points at each
examination, and such other information as the Bureau may require, shall
be made by the mine foreman to the district mine inspector upon blanks to
be provided by the Bureau.

An. Code, 1924, sec. 105. 1922, ch. 307, sec. 104.

105. No person ordered by the mine foreman to leave a mine because
of ventilation difficulty shall re-enter until given permission by such mine
foreman; which permission, if the mine be gaseous, shall not be given
until the mine has been thoroughly examined by the mine foreman or fire
boss, and reported safe. The district mine inspector shall examine all rec-
ords of ventilation at every visit to such mine, and inspect the apparatus
and all instrumentalities for conducting, controlling or supplying ventila-
tion, shall see to the enforcement of each requirement of this sub-title or
regulations thereunder relating thereto, and keep a detailed record of each
such inspection and his steps taken thereupon.