 | Pennsylvania. Laws, statutes, etc - 1891 - 728 halaman
...provide and maintain a suitable appliance by or through which conversation can be held by and l*>tweeu persons at the bottom and at the top of the shaft or slope, and also an efficient means of signaling from the bottom of such shaft or slope to the engineer ¡i)... | |
 | Indiana - 1892 - 938 halaman
...agent or lessee of all coal mines shall provide and maintain a metal tube from the bottom of the shaft, suitably adapted to the free passage of sound, through...conversation may be held between persons at the bottom and top of the shaft. 8324. Statute — Application of. § 22. That the provisions of this act shall apply... | |
 | 1892 - 774 halaman
...shall forthwith provide, and hereafter maintain, a metal tubof rom the top to the bottom of such shaft, suitably adapted to the free passage of sound, through...which conversation may be held between persons at the top and at the bottom of the shaft, also the ordinary means of signaling1, and an approved safety catch... | |
 | United States. Bureau of Labor - 1892 - 616 halaman
...forthwith provide , and hereafter maintain, a metal tube from the top to the bottom of euoh shaft, suitably adapted to the free passage of sound, through which conversation may be held between persone at the top and at the botiom of the shaft , also the ordinary means of signaling, and an approved... | |
 | Pennsylvania. Laws, statutes, etc - 1893 - 836 halaman
...the top to bottom of every in every shaft. shaft where persons are raised or lowered, a metal tube suitably adapted to the free passage of sound through...which conversation may be held between persons at the •to'p and bottom of said shaft, and also a means of signaling from the top to the bottom thereof,... | |
 | Pennsylvania - 1894 - 1270 halaman
...to l>ottom of every shaft where persons are raised or lowered, a metal tube suitably 8 '• P- 1- w. adapted to the free passage of sound through which conversation may be held speaking and sisbetween persons at the top and bottom of said shaft, and also a means of signalling... | |
 | United States. Bureau of Labor - 1896 - 1396 halaman
...¡igent or lessee of all coal mines shall provide and maintain a metal tube from the bottom of the shaft, suitably adapted to the free passage of sound, through...conversation may be held between persons at the bottom and top of the shaft. SEC. 7482. The provisions of this act shall apply to all coal mines in this State,... | |
 | Pennsylvania. Inspectors of Mines - 1896 - 754 halaman
...shall provide and main tain a suitable appliance by or through which conversation can be held by and between persons at the bottom and at the top of the shaft or slope, and also an efficient means of signaling from the bottom of such shaft or slope to the engineer in... | |
 | Pennsylvania. Inspectors of Mines - 1897 - 728 halaman
...and maintain, from the top to bottom of every shaft where persons are raised or lowered, a metal tube suitably adapted to the free passage of sound through...which conversation may be held between persons at the top and bottom of said shaft, and also a means of signaling from the top to the bottom thereof, and... | |
 | 1897 - 268 halaman
...shall forthwith provide, and hereafter maintain, a metal tube from the top to the bottom of such shaft, suitably adapted to the free passage of sound, through...which conversation may be held between persons at the top and at the bottom of the shaft, also the ordinary means of signaling, and an approved safety catch... | |
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... suitably adapted to the free passage of sound, through which conversation may be held between persons at the bottom and... 
