Biennial Report, Volumes 1-21883 |
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Results 1-5 of 80
Page 12
... ventilation . There has been a great improvement in the ventilation of the mines in the last two years , but still there are some mines that are very poorly ventilated , and cannot be remedied until section ten of the present mining law ...
... ventilation . There has been a great improvement in the ventilation of the mines in the last two years , but still there are some mines that are very poorly ventilated , and cannot be remedied until section ten of the present mining law ...
Page 15
... ventilation . These mines being opened have about doubled the amount of miners in the county , and more than doubled the annual output of coal . KEOKUK COUNTY . This county has considerable coal , but like other counties , the coal lays ...
... ventilation . These mines being opened have about doubled the amount of miners in the county , and more than doubled the annual output of coal . KEOKUK COUNTY . This county has considerable coal , but like other counties , the coal lays ...
Page 16
... ventilation , he finally concluded to try one ; and after the fan was in place I visited the mine , and found the ventilation good , with a volume of air in circulation of fifty- one thousand cubic feet per minute . As this was the ...
... ventilation , he finally concluded to try one ; and after the fan was in place I visited the mine , and found the ventilation good , with a volume of air in circulation of fifty- one thousand cubic feet per minute . As this was the ...
Page 17
... 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 ventilated by a furnace ...
... 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 ventilated by a furnace ...
Page 19
... ventilation has been restored , and I have been requested by the su- perintendents , Wightman and Ramsey both , to visit the mine , and report its condition ; but as I felt confident the sanitary condition of the mine was good , and my ...
... ventilation has been restored , and I have been requested by the su- perintendents , Wightman and Ramsey both , to visit the mine , and report its condition ; but as I felt confident the sanitary condition of the mine was good , and my ...
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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