 | Ohio - 1872 - 368 páginas
...provide and maintain within six reqaired. months after the passage of this act, for every such mine, an amount of ventilation of not less than one hundred cubic feet per minute per person employed in such mine, which shall be circulated to the face of each and every... | |
 | Ohio. General Assembly. Senate - 1872 - 924 páginas
...drift, shall provide and maintain, within six months after the passage o1 this act, for every such mine, an amount of ventilation of not less than one hundred cubic feet per minute per person employed in such mine, which shall be circulated to the face of each and every... | |
 | 1875 - 762 páginas
...drift, shall provide and maintain, within six months after the passageof this act, for every such mine, an amount of ventilation of not less than one hundred cubic feet per minute per person employed in such mine, and as much more as the inspector may direct, which shall... | |
 | 1885 - 606 páginas
...mine, whether it be operated by shaft, slope, or drift, shall provide and maintain for every such mine an amount of ventilation of not less than one hundred cubic feet of air per minute for each person employed in such mine, and not less than five hundred cubic feet of air per minute for each mule or... | |
 | Iowa. General Assembly - 1882 - 700 páginas
...therefore, recommend that the operator of every coal mine shall provide and maintain for every such mine an amount of ventilation of not less than one hundred cubic feet per minute for each person employed in such mine; and that all mines governed by the provisions of... | |
 | 1883 - 340 páginas
...therefore recommend that the operator of every coal mine shall provide and maintain for «very such mine an amount of ventilation of not less than one hundred cubic feet per minute for each person, and five hundred cubic feet for each animal employed in such mine, and... | |
 | Washington (State) - 1883 - 494 páginas
...in this territory, whether shaft, slope, drift or tunnel, shall provide and maintain for such mine an amount of ventilation of not less than one hundred cubic feet per minute per person employed in such coal mine, and as much more as the inspector may direct, which... | |
 | Iowa - 1884 - 336 páginas
...mine, wh'ether it be operated bv shaft, slope, or drift, shall provide and maintain for every such mine an amount of ventilation of not less than one hundred cubic feet of air per minute for each person employed in such mine, and not less than five hundred cubio feet of air per minute for each mule or... | |
 | Iowa - 1884 - 336 páginas
...mine, whether it be operated bv shaft, slope, or drift, shall provide and maintain for every such mine an amount of ventilation of not less, than one hundred cubic feet of air per minute for each person employed in such mine, and not lees than five hundred cubic feet of air per minute for each mule or... | |
 | Iowa, Emlin McClain - 1884 - 314 páginas
...mine, whether it be operated by shaft, slope, or drift, shall provide and maintain for every such mine an amount of ventilation of not less than one hundred cubic feet of air per minute for each porson employed in such mine, and not less than five hundred cubic feet of air per minute for each... | |
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The owner or agent of every coal mine, whether it be operated by shaft, slope, or drift, shall provide and maintain for every such mine an amount of ventilation of not less than one hundred cubic feet of air per minute for each person... 
