Sec. 952. [=Duties of mine foreman.=] The mine-foreman shall attend personally to his duties in the mine, carry out all the provisions set forth in this act, see that the regulations prescribed for each class of workmen under his charge are carried out in the strictest manner possible, and see that any deviations from any of them are promptly adjusted. (Sec. 953, 965.) [=When ventilation stops.=] In case of accident to a ventilating fan, or its machinery, whereby the ventilation of the mine would be seriously interrupted, he shall promptly order the men to immediately withdraw from the mine and not return to their work until the ventilation has been restored, and his permission to enter is given; if at a mine which generates fire-damp, he shall not order them to return until the mine has been thoroughly examined by him, or his assistant, and reported to be safe. (Sec. 922, 923, 924.) [=Dangerous places fenced.=] He shall see that all dangerous places are properly fenced off, and proper danger signal boards are hung on such fencing that they may be plainly seen; he shall also travel all air-ways, and examine all the accessible openings to old workings as often as is necessary to insure their safety. (Sec. 925.) [=Examination of working places.=] He shall examine each working place, or have it examined by his assistant, at least once each alternate day that persons are or should be at work therein and oftener, when, in his judgment, the circumstances require. He shall instruct pick miners and machine runners regarding the width of working places. (Sec. 956.) Sec. 953. [=When working place is unsafe.=] When a working place becomes unsafe from any cause, he shall order the person or persons working therein, to cease mining or loading, and not to remain in such working place, except as may be necessary to make it safe, until it is made safe. (Sec. 956.) [=Supplying of props and timber.=] He shall see that the working place of each miner is kept supplied with props of approximate length, caps, and other timbers necessary to securely prop the roof thereof. When he examines a working place, he shall observe the condition of the roof and timbering, and instruct the workmen therein as to the proper method of timbering for the security of the roof. He shall give such instructions to drivers, motormen, trip-riders, and other persons, as may be necessary to keep a supply of timber in each working place. (Sec. 933, 956.) [=Miner without props or timber.=] When he finds a miner in a working place without the necessary props, caps or timbers to securely prop the roof thereof, he shall order such miner to leave such working place until the required timber is supplied, which he shall attend to promptly, and shall order that no cars be delivered to such miner, until timber is supplied. (Sec. 933, 956.)