A Rudimentary Treatise on Coal and Coal Mining... |
From inside the book
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Page 16
... sometimes greyish black ; lustre , more waxy than that of anthracite , in some varieties dull ; fracture , sub- conchoidal to uneven , the substance often divided by cleats or joints into parallel - faced figures ( cubical coal , dicey ...
... sometimes greyish black ; lustre , more waxy than that of anthracite , in some varieties dull ; fracture , sub- conchoidal to uneven , the substance often divided by cleats or joints into parallel - faced figures ( cubical coal , dicey ...
Page 19
... sometimes resinous , sometimes dull ; specific gravity 0.5 to 1.5 ; fracture various ; burns easily , with a smoky flame and unpleasant odour . Composition , 50 to 70 per cent . of carbon , a much larger proportion of oxygen than in the ...
... sometimes resinous , sometimes dull ; specific gravity 0.5 to 1.5 ; fracture various ; burns easily , with a smoky flame and unpleasant odour . Composition , 50 to 70 per cent . of carbon , a much larger proportion of oxygen than in the ...
Page 25
... sometimes run with a line of parting , and needs to be carefully picked out . The partings are often mere planes of division , and are then sometimes smooth surfaces , slicks , requiring caution in undercutting ; but are more generally ...
... sometimes run with a line of parting , and needs to be carefully picked out . The partings are often mere planes of division , and are then sometimes smooth surfaces , slicks , requiring caution in undercutting ; but are more generally ...
Page 26
... sometimes the entire coal is gone , but for a certain width only , is a kind of fault ( nip or want ) , that has often been noticed , and is confined to one seam , not affecting , or only slightly , those above it or below it . An ...
... sometimes the entire coal is gone , but for a certain width only , is a kind of fault ( nip or want ) , that has often been noticed , and is confined to one seam , not affecting , or only slightly , those above it or below it . An ...
Page 27
... sometimes not merely by the usual normal thickness of the coal , but by an exceptional amount , to make up as it were for the thinness to which it had before been reduced . One of the most notable examples of this kind is in the fine ...
... sometimes not merely by the usual normal thickness of the coal , but by an exceptional amount , to make up as it were for the thinness to which it had before been reduced . One of the most notable examples of this kind is in the fine ...
Common terms and phrases
accidents amount anthracite applied Architect ARCHITECTURE Author beds Belgium bords bottom brattice Bridge C.E. Illustrated cage carboniferous carboniferous limestone cloth boards coal-measures coalfield collieries Construction containing cylinder depth Derbyshire districts drum Edition employed engine enlarged fathoms feet of coal feet thick field fire-damp Forest of Dean fossil fuel furnace gauze geological inches diameter inclined ironstone Lancashire length levels light lignite limestone long-wall lower LUDGATE HILL measures method miles millstone grit mineral mines mode modern Newcastle North Outfall Sewer passing pillars pits placed Plates Practical pumps quantity Railway raised RALPH TATE revised roads rocks rods roof rope Rudimentary Treatise safety lamps sandstone scale Science SCOTT BURN shaft shales side South Wales square miles steam stone strata surface Tables thin Timber tion tons tubs upper valuable ventilation volume waggons wedging wheels whilst wood Woodcuts workable yards
Popular passages
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