A Rudimentary Treatise on Coal and Coal Mining... |
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Page 6
... diameter , working 15 - inch pumps , to be soon followed by others at Wheal Rose , near Redruth , * The engine with its piston ( pistillum ) is described and figured in the " Acta Eruditorum , " Lipsia , 1707 . Wheal Busy , and Polgooth ...
... diameter , working 15 - inch pumps , to be soon followed by others at Wheal Rose , near Redruth , * The engine with its piston ( pistillum ) is described and figured in the " Acta Eruditorum , " Lipsia , 1707 . Wheal Busy , and Polgooth ...
Page 29
... diameter and 30 to 60 feet in length . Their beautiful fluted and symmetrically scarred patterns may often be seen cross- ing one another in luxuriant confu- sion in the roof from under which the coal has been removed . I had an ...
... diameter and 30 to 60 feet in length . Their beautiful fluted and symmetrically scarred patterns may often be seen cross- ing one another in luxuriant confu- sion in the roof from under which the coal has been removed . I had an ...
Page 107
... diameter , and may be guarded against many of the accidents to which they are liable , by being lined with pipes of sheet - iron , added on from above as the hole increases in depth . When larger diameters are to be employed , and ...
... diameter , and may be guarded against many of the accidents to which they are liable , by being lined with pipes of sheet - iron , added on from above as the hole increases in depth . When larger diameters are to be employed , and ...
Page 108
... order to combine this source of economy with the mode of gaining personal access to the coal , shafts of from 3 to 15 feet diameter have in Westphalia been sunk by gigantic boring apparatus ; successfully , so 108 COAL AND COAL - MINING .
... order to combine this source of economy with the mode of gaining personal access to the coal , shafts of from 3 to 15 feet diameter have in Westphalia been sunk by gigantic boring apparatus ; successfully , so 108 COAL AND COAL - MINING .
Page 109
... diameter ; and whilst for ordinary purposes they are now commonly 8 or 10 feet diameter in the clear , they attain , when intended for an important upcast , or for a large get of coal , to as much as 16 feet diameter . * The actual ...
... diameter ; and whilst for ordinary purposes they are now commonly 8 or 10 feet diameter in the clear , they attain , when intended for an important upcast , or for a large get of coal , to as much as 16 feet diameter . * The actual ...
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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