the supply of fresh air and the elimination, as far as possible, of dangerous gases, for safe means of hoisting and lowering cages, for a limitation upon the number of persons permitted to enter a cage, that cages shall be covered, and that there shall be fences and gates around the top of shafts, besides other similar precautions. Digest of Stats, of Arkansas, 1149; California, Stats. March 16,1872, c. 305 ; March 27,1S74, c. 498; March 14,1881, c. 72; March 8, 1893, c. 74; Colorado, Mills’ Anno. Stats. v. 3 Sup. c. 85; Gen. Stats, of Conn. 1888, secs. 2645 to 2647, 2263 to 2272; Rev. Stats. Illinois, 18S9, p. 980; Thornton’s Indiana Stats. 1897, c. 98, p. 1652 ; Gen. Stats, of Kansas, 1S97, vol. 2, pp. 813 to 824; Kentucky Stats. (Barbour & Carroll) c. 88, р. 951; Mass. Acts May 21, 1891, c. 350; March 19,1S92, c. 83 ;• April 25, 1892, c. 210; June 8, 1892, c. 352; June 11, 1892, с. 357 ; June 3, 1893, c. 406 ; June 22,1894, c. 508 ; March 16, 1895, c. 129; Michigan (Howells’ Anno. Stats.), secs. 92095 et seq.; Gen. Stats. of New Jersey, v. 2, pp. 1900 et seq.; Rev. Stat. Code and Gen. Laws of New York, vol. 2, p. 2069; Brightley’s Purdon’s Digest, Sup. Pennsylvania, 1885-1887, pp. 2241 et seq.
These statutes have been repeatedly enforced by the courts of the.several States; their validity assumed, and, so far as we are informed, they have been uniformly held to be constitutional.
In Daniels v. Hilgard, 77 Illinois, 640, it was held that ' the legislature had power under the Constitution to establish reasonable police regulations for the operating of mines and collieries, and that an act providing for the health and safety of persons employed in coal mines, which required the owner or agent of every coal mine or colliery employing ten men qv more, to make or cause to be made an accurate map or plan of the workings of such coal mine or colliery, was not unconstitutional; and that the question whether certain requirements are a part of a system of police regulations adopted to aid in the protection of life and health, was properly one of legislative determination, and that a court should not lightly interfere with such determination unless the legislature had manifestly transcended its province. See also Litchfield Coal Co. v. Taylor, 81 Illinois, 590.
In Commonwealth v. Bonnell et al., 8 Phila. 534, a law,