A History of Technology: The industrial revolution, c. 1750 to c. 1850Clarendon Press, 1958 |
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Page 85
... face . This meant either that tram - rails had to be laid along the coal - face , which could be done only in seams 3 ft or more in thickness ; or that roads had to be made partly in the coal and partly in the roof at intervals of 12 to ...
... face . This meant either that tram - rails had to be laid along the coal - face , which could be done only in seams 3 ft or more in thickness ; or that roads had to be made partly in the coal and partly in the roof at intervals of 12 to ...
Page 87
... face . The pur- pose of these walls is to cushion the lowering of the roof after its supporting coal is removed and thus preserve as far as possible its unbroken state , especially at the face itself . FIGURE 47 - Longwall mining , as ...
... face . The pur- pose of these walls is to cushion the lowering of the roof after its supporting coal is removed and thus preserve as far as possible its unbroken state , especially at the face itself . FIGURE 47 - Longwall mining , as ...
Page 543
... face , straight and square on all the sides , so as to fit close together , with a base equal to the face , thus forming in fact an ashlar causeway . The dimensions of the stones were to be : Width ( inches ) Depth ( inches ) Length ...
... face , straight and square on all the sides , so as to fit close together , with a base equal to the face , thus forming in fact an ashlar causeway . The dimensions of the stones were to be : Width ( inches ) Depth ( inches ) Length ...
Contents
GLASS by L M ANGUSBUTTERWORTH Director The Newton Heath Glass | 12 |
TELEGRAPHY by G R M GARRATT Deputy Keeper Department of Electrical | 22 |
FISH PRESERVATION by C L CUTTING Officer in Charge Humber | 44 |
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agricultural beam became Boulton Boulton and Watt bridge Britain British built canal carbon carried cast iron chemical clay coal Coalbrookdale coke construction copper crops cylinder D. E. Woodall developed diameter driving E. J. HOLMYARD early eighteenth century engine England Europe farming figure fish France French furnace glass heat husbandry Ibid important improved inches increased industrial revolution introduced invention J. F. Horrabin John Smeaton later lathe London machine machinery manufacture mechanical metal method mill mineral mines Newcomen Newcomen engine nineteenth century obtained operation oxide Paris patent Photograph by courtesy pipe piston plate practice produced pump river road rollers rotation Rotherham plough salt Science Museum screw sewers shaft ships silk Smeaton smelting Staffordshire steam steam-engine steel stone sulphuric acid surface tion tuyère vertical ware water-wheels watermills Watt whales wheel wooden wrought iron