 | Pennsylvania. Inspectors of Mines - 1896 - 754 str.
...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... | |
 | Pennsylvania. Inspectors of Mines - 1897 - 728 str.
...shall provide and maintain 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... | |
 | 1875 - 762 str.
...or agent shall provide and maintain a metal tube from the top to the bottom of the slope or shaft, suitably adapted to the free passage of sound, through...of the shaft or slope ; also, the ordinary means of signalling to and from the top and bottom of the shaft or slope, and an approved safety-catch, and... | |
 | Pennsylvania. Laws, statutes, etc - 1877 - 650 str.
...tubes to vide and maintain a metal tube from the top to the bottom of ueprovuiea. the slope or shaft, suitably adapted to the free passage of sound, through...ordinary means of signaling to and from the top and Als0j means0( Sig. bottom of the shaft or slopo, and an approved safety catch n»u«>8and sufficient... | |
 | Tennessee - 1881 - 390 str.
...calculated and adapted to the free passage of sound therein, through which conversation may be held by and between persons at the bottom and at the top of the shaft or slope, and also some modern practical means for signaling from tub ? seaa"n°f and to the top of the shafi... | |
 | Iowa. General Assembly - 1882 - 700 str.
...owner or agent shall provide and maintain a metal tube from the top to the bottom of the slope or shaft suitably adapted to the free passage of sound through...or slope; also the ordinary means of signaling to ana from the top and bottom of the shaft or slope, and an approved safety-catch, and sufficient cover... | |
 | Henry Martyn Chance - 1883 - 716 str.
...or agent shall provide and maintain a metal tube from the top to the bottom of the slope or shaft, suitably adapted to the free passage of sound, through...from the top and bottom of the shaft or slope, and an approved safety catch and sufficient cover overhead on every carriage used for lowering and hoisting... | |
 | 1883 - 340 str.
...operator, lessee or agent shall provide and maintain a metal tube from the top to the bottom of the shaft suitably adapted to the free passage of sound through...persons at the bottom and at the top of the shaft; also, the ordinary means of signaling to and from the top and bottom of the shaft and an approved safety... | |
 | Kansas - 1883 - 306 str.
...be vide and maintain a metal tube from the top to the bottom talk f through. Of (.jje shaft or slOpe suitably adapted to the free passage of sound, through...conversation may be held between persons at the bottom and top of such shaft or slope, and there shall also be maintained the ordinary means of signaling to and... | |
 | Iowa. General Assembly - 1884 - 1026 str.
...or agent shall provide and maintain a metal tube from the top to the bottom of the slope or shaft, suitably adapted to the free passage of sound, through...signaling to and from the top and bottom of the shaft of slope, and an approved safety catch, and sufficient cover overhead on every carriage used for lowering... | |
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... shaft, suitably adapted to the free passage of sound, through which conversation may be held between persons at the bottom and... 
