Mining: An Elementary Treatise on the Getting of MineralsLongmans, Green, 1904 - 547 страници |
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Страница xi
... coal - seams uniting to form one 24. Sandstone merging into shale . 25 , 26. Magnified sections of coal - plant , lepidodendron 27. Section across Midland Coal - field 28. Vertical section of Derbyshire Coal - field between Chester ...
... coal - seams uniting to form one 24. Sandstone merging into shale . 25 , 26. Magnified sections of coal - plant , lepidodendron 27. Section across Midland Coal - field 28. Vertical section of Derbyshire Coal - field between Chester ...
Страница xvi
... coal workings : plan 171 172 237 . 238 . " " section " " 173 " " " " enlarged plan . 173 239. Thick coal ( Silesia ) . 240. Grand combe ( France ) 241 . Section of thick coal and shafts ( St. Etienne ) . 174 175 175 242. Longitudinal ...
... coal workings : plan 171 172 237 . 238 . " " section " " 173 " " " " enlarged plan . 173 239. Thick coal ( Silesia ) . 240. Grand combe ( France ) 241 . Section of thick coal and shafts ( St. Etienne ) . 174 175 175 242. Longitudinal ...
Страница xxiv
... Coal - screens and steam hoist : plan and sections 573 , 574. Coal - screens : plan and section , showing tippler , sorting stage , etc. PAGE 462 575. Coal - screens : travelling belt 463 576. Coke - ovens 464 577. Coal - washing jigger ...
... Coal - screens and steam hoist : plan and sections 573 , 574. Coal - screens : plan and section , showing tippler , sorting stage , etc. PAGE 462 575. Coal - screens : travelling belt 463 576. Coke - ovens 464 577. Coal - washing jigger ...
Страница xxv
... Coal Commis- sion ( 1871 ) , the Geological Survey , and other sources , shows the position and extent of the coal - fields of the United Kingdom . Where the coal - fields are concealed by newer formations , their probable extent is ...
... Coal Commis- sion ( 1871 ) , the Geological Survey , and other sources , shows the position and extent of the coal - fields of the United Kingdom . Where the coal - fields are concealed by newer formations , their probable extent is ...
Страница xxvi
... coal measures , which have been removed by denudation . The following is a list of the chief coal - fields in the United Kingdom : - I. The North Midland Coal - field . — This coal - field extends through the counties of Yorkshire ...
... coal measures , which have been removed by denudation . The following is a list of the chief coal - fields in the United Kingdom : - I. The North Midland Coal - field . — This coal - field extends through the counties of Yorkshire ...
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Често срещани думи и фрази
air-current air-road anemometer bars bore-hole boring bottom brattice brick cage capstan cent centre coal measures coal-dust Coal-field colliery compressed conductors cubic foot cylinder Davy lamp depth detonator dirt distance drill driven drum electric engine fire-damp flame flange foot foot-pounds friction fulminate of mercury furnace gauze ground gunpowder haulage heat hole hoppet inches in diameter incline iron ironstone lamp length lifted load lower machine Millstone Grit mineral mines minute outcrop pass Permian pillars pipe piston pit-bottom plate props pulley pump road rocks rods roof rope rule safety-lamp sandstone screw seam of coal shaft shale shown in Fig shows side sinking sometimes speed spur-gearing square inch stalls steam steel stone strata stroke surface temperature thick timber tons tubbing tube upcast valves vein velocity vertical waggons Warwickshire water-gauge wedge weight wheel wire yards
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