 | Pennsylvania. Laws, statutes, etc - 1885 - 580 páginas
...be closed. Doors. Mfiin doors to be attended to. How main doors are to be placed. Extra mniu door. minute, for each and every person employed in any mine, and as much more as the circumstances may require. SECTION 4. The ventilating currents shall be conducted and circulated... | |
 | Pennsylvania. State Board of Health and Vital Statistics - 1887 - 1108 páginas
...to use a furnace for the purpose of ventilating any mine wherein explosive gases are generated. 446. The minimum quantity of air thus produced shall not...every person employed in any mine, and as much more as the circumstances may require. 447. The ventilating currents shall be conducted and circulated to and... | |
 | 1887 - 344 páginas
...purpose of ventilating any mine Turnacffl , prohi . wherein explosive gases are generated. bind. 164. The minimum quantity of air thus produced shall not be less than two Ibld - ? 3 hundred cubic feet per minute, for each and every person employed in any mine, TWO hundred... | |
 | Sir Frederick Augustus Abel - 1889 - 452 páginas
...use a furnace for the purpose of ventilating any mine wherein explosive gases are generated. SEC. 3. The minimum quantity of air thus produced shall not...every person employed in any mine, and as much more as the circumstances may require. Sic. 4. The ventilating currents shall be conducted and circulated to... | |
 | Pennsylvania. Laws, statutes, etc - 1891 - 728 páginas
...a furnace for the purpose of ventilating any mine wherein explosive gases are generated. SECTION 3. The minimum quantity of air thus produced, shall not be less than two hundred (200) cubicfeet per minute for each and every person employed in any mine, and as much more as the circumstances... | |
 | 1892 - 774 páginas
...purpose of ventilating any mine wherein explosive gases are generated. SECTION 3. The minimum quanity of air thus produced shall not be less than two hundred...every person employed in any mine, and as much more as the circumstances may require. SECTION 4. The ventilating currents shall be conducted and circulated... | |
 | United States. Bureau of Labor - 1892 - 616 páginas
...purpose of ventilating any mine wherein explosive gases are generated. SECTION 3. The minimum quanity of air thus produced shall not be less than two hundred...every person employed in any mine, and as much more as the circumstances may require. SECTION 4. The ventilating currents shall be conducted and circulated... | |
 | Pennsylvania - 1894 - 1270 páginas
...the purpose of ventilating any Furnaces prohlbmine wherein explosive gases are generated. ited. 117. The minimum quantity of air thus produced, shall not be less than two Ibid. $ 8. hundred (200) cubic feet per minute for each and every person employed in any Two hundred... | |
 | 1899 - 934 páginas
...prescribing a statutory minimum quantity. In the case of the anthracite mines the section is as follows : — "The minimum quantity of air thus produced shall not...every person employed in any mine, and as much more as the circumstances " may require." Article IV., section 1 of the Act governing bituminous coal mines... | |
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The minimum quantity of air thus produced shall not be less than two hundred (200) cubic feet per minute for each and every person employed in any mine, and as much more as the circumstances may require. 
