Annual report of the Board of agriculture of the State of OhioBoard of agriculture, 1867 |
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Pagina 22
... bituminous matter , which , when burned off , leaves the ore very rich , and in the furnace , when used raw , diminishes very sensibly the quantity of fuel necessary for its reduction . The specimens which I took from the Shaft Mine ...
... bituminous matter , which , when burned off , leaves the ore very rich , and in the furnace , when used raw , diminishes very sensibly the quantity of fuel necessary for its reduction . The specimens which I took from the Shaft Mine ...
Pagina 27
... bituminous coal at the bottom , two inches in thickness , is all cannel . It is bright and handsome , coming from the mine in quadrangu- lar blocks , which have internally a somewhat conchoidal fracture . In its general appearance it ...
... bituminous coal at the bottom , two inches in thickness , is all cannel . It is bright and handsome , coming from the mine in quadrangu- lar blocks , which have internally a somewhat conchoidal fracture . In its general appearance it ...
Pagina 28
... bituminous coal , considerably diminished in thickness . At Ewing's mine , near the steam saw - mill , in the south - west corner of Canfield , it is but 2 feet in thickness , the lower two feet being bituminous coal of good quality ...
... bituminous coal , considerably diminished in thickness . At Ewing's mine , near the steam saw - mill , in the south - west corner of Canfield , it is but 2 feet in thickness , the lower two feet being bituminous coal of good quality ...
Pagina 35
... Bituminous Shale . - Above the rock ore occurs a thick bed of bitumin- ous shale ; a striking feature in the geology of the vicinity of New Lisbon , and the equivalent of coal - seam No. 4 , the cannel seam of Canfield . Sandstone . The ...
... Bituminous Shale . - Above the rock ore occurs a thick bed of bitumin- ous shale ; a striking feature in the geology of the vicinity of New Lisbon , and the equivalent of coal - seam No. 4 , the cannel seam of Canfield . Sandstone . The ...
Pagina 36
... bituminous shale is here very conspicuous , and has been mined as cannel coal . It is so highly charged with bitumen that it burns freely , and in the absence of a better combustible might be used for the generation of heat , but it ...
... bituminous shale is here very conspicuous , and has been mined as cannel coal . It is so highly charged with bitumen that it burns freely , and in the absence of a better combustible might be used for the generation of heat , but it ...
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