Biennial Report, Volúmenes1-21883 |
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Página 13
... furnace , and now has a good current of air traveling through the mine , and are using a single rope , with steam power , to haul the coal to the bottom of the shaft . There have been numerous mines opened in different localities in the ...
... furnace , and now has a good current of air traveling through the mine , and are using a single rope , with steam power , to haul the coal to the bottom of the shaft . There have been numerous mines opened in different localities in the ...
Página 15
... furnace , and if proper care is given to keep- ing a fire , there need be complaint about ventilation . These mines being opened have about doubled the amount of miners in the county , and more than doubled the annual output of coal ...
... furnace , and if proper care is given to keep- ing a fire , there need be complaint about ventilation . These mines being opened have about doubled the amount of miners in the county , and more than doubled the annual output of coal ...
Página 16
... furnace , but has since been connected with shaft A underground , and both shafts are ventilated by the fan at shaft A. The underground work of the B shaft is man- aged by Sandy Orr , and is in good condition , and will compare favor ...
... furnace , but has since been connected with shaft A underground , and both shafts are ventilated by the fan at shaft A. The underground work of the B shaft is man- aged by Sandy Orr , and is in good condition , and will compare favor ...
Página 17
... furnace , and the ventilation was good when I last visited the mine , there being one hundred and twenty - seven cubic feet per man per minute . The Rosetta mine was opened about the same time of the Musca- tine mine , and is also ...
... furnace , and the ventilation was good when I last visited the mine , there being one hundred and twenty - seven cubic feet per man per minute . The Rosetta mine was opened about the same time of the Musca- tine mine , and is also ...
Página 20
... furnace , with a volume of air of thirty thousand cubic feet per minute , and had forty - three miners employed . This is a new slope , and bids fair to make one of the best mines in the State . The coal is brought to the surface by ...
... furnace , with a volume of air of thirty thousand cubic feet per minute , and had forty - three miners employed . This is a new slope , and bids fair to make one of the best mines in the State . The coal is brought to the surface by ...
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accident air-way Albia Angus appointed bituminous coal Bituminous shales black-damp Blue sand shales Boone county Boonesboro cage carbonic acid cause charge Coal and Mining Coal Company coal measures coal mines comply condition Coroner court creek cubic feet Dark death district dollars Drift deposit duties engine entry escape shaft examination feet per minute five furnace furnish Governor Gray clay shales hoisting shaft hole hundred feet Impure inches inspection inspector of mines jurors Kalo Keokuk county Kirkville labor Light limestone located Lucas county machinery Mahaska county map or plan MCELHANY miles miners mining boss Mining Company mining law Moines river oaths do say opening Oskaloosa Ottumwa owner or agent persons employed Polk county pressure proper railroad rock roof safety safety-lamp sandstone shaft or slope side superintendent therein thereof thickness thousand tion underground ventilation volume of air Wapello county William