Mining: An Elementary Treatise on the Getting of MineralsLongmans, Green, 1904 - 547 страници |
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Страница xiv
... side ( Llanbradach ) 109 163 . Bore - hole draining pit IIO 164 . Rectangular shafts : section III 165 . 166 . Shaft nearly round 167 . Temporary shaft lining Rectangular shafts : plan 168. Temporary shaft lining ( Walker's ) : plan 169 ...
... side ( Llanbradach ) 109 163 . Bore - hole draining pit IIO 164 . Rectangular shafts : section III 165 . 166 . Shaft nearly round 167 . Temporary shaft lining Rectangular shafts : plan 168. Temporary shaft lining ( Walker's ) : plan 169 ...
Страница xxii
... side view 388 492a . end view " " 493 . " " iron saddle 389 389 494. Single water - wheel , gearing and drum : end view 390 494a . " " وور side view 390 496 . Water - balance . 498 . 99 499 . 495. Double water - wheel 497. Single ...
... side view 388 492a . end view " " 493 . " " iron saddle 389 389 494. Single water - wheel , gearing and drum : end view 390 494a . " " وور side view 390 496 . Water - balance . 498 . 99 499 . 495. Double water - wheel 497. Single ...
Страница xxiii
... side 560. Double - beat valve , with guttapercha seats 561. Steel bucket with brass rings 564. Compound steam - pump , underground , with fly - wheel 565. Steam - pump coupled , underground ( Worthington ) . 449 449 449 450 451 • 452 ...
... side 560. Double - beat valve , with guttapercha seats 561. Steel bucket with brass rings 564. Compound steam - pump , underground , with fly - wheel 565. Steam - pump coupled , underground ( Worthington ) . 449 449 449 450 451 • 452 ...
Страница xxiv
... side view 588. Stamp front view 589. Ordinary Cornish stamp feldspar end view 467 99 22 side view 468 469 470 472 472 473 474 474 475 590 , 591. Concentrating - tables 475 592. Lump of slate . 476 593. Splitting slates . 479 479 SAFETY ...
... side view 588. Stamp front view 589. Ordinary Cornish stamp feldspar end view 467 99 22 side view 468 469 470 472 472 473 474 474 475 590 , 591. Concentrating - tables 475 592. Lump of slate . 476 593. Splitting slates . 479 479 SAFETY ...
Страница xxviii
... side , being worked at Neston . The number of mines in the North Wales Coal - field is 65 . 6. The North ... sides by the Lower Carboniferous rocks , the seams dipping east and west and north and south to a central axis . The number of ...
... side , being worked at Neston . The number of mines in the North Wales Coal - field is 65 . 6. The North ... sides by the Lower Carboniferous rocks , the seams dipping east and west and north and south to a central axis . The number of ...
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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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