Biennial Report, Volúmenes1-21883 |
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Resultados 1-5 de 37
Página 15
... considerable coal , but like other counties , the coal lays in basins or pockets . A majority of the superficial area is un- derlaid with the coal formation , but not more than one fourth of the territory so underlaid bears a seam of ...
... considerable coal , but like other counties , the coal lays in basins or pockets . A majority of the superficial area is un- derlaid with the coal formation , but not more than one fourth of the territory so underlaid bears a seam of ...
Página 16
... considerable interest manifested by other operators to know what the volume of air would be if the fan was run at two hundred revolutions per minute ; and on the evening before I left I was requested to make another test , which I ...
... considerable interest manifested by other operators to know what the volume of air would be if the fan was run at two hundred revolutions per minute ; and on the evening before I left I was requested to make another test , which I ...
Página 17
... considerable change in the management of some of the mines at What Cheer . The Starr Coal Company , who were ope- rating the three shafts known as Starr A , Starr B , and Starr C , have now consolidated with the Rosetta , Muscatine ...
... considerable change in the management of some of the mines at What Cheer . The Starr Coal Company , who were ope- rating the three shafts known as Starr A , Starr B , and Starr C , have now consolidated with the Rosetta , Muscatine ...
Página 18
... considerable distance up the creeks from their mouths , and for this reason the geology of the county has been pretty accurately determined ; and when the old theory is abandoned , that our Iowa coal lays in one continuous bed from one ...
... considerable distance up the creeks from their mouths , and for this reason the geology of the county has been pretty accurately determined ; and when the old theory is abandoned , that our Iowa coal lays in one continuous bed from one ...
Página 19
... considerable trouble , and lost several rooms and the entry adjoining . Some of the rooms were very poorly timbered , and in one instance I requested the cars stopped from two men until they timbered their room , which was done as soon ...
... considerable trouble , and lost several rooms and the entry adjoining . Some of the rooms were very poorly timbered , and in one instance I requested the cars stopped from two men until they timbered their room , which was done as soon ...
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Términos y frases comunes
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