A History of Technology: The industrial revolution, c. 1750 to c. 1850Clarendon Press, 1958 |
From inside the book
Results 1-3 of 31
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 463
... face . Small screw - jacks bore against the verticals of the shield and held boards against the face , except where it was actually being cut . The tunnel started from a vertical shaft 50 ft in diameter at the Rotherhithe end , and ...
... face . Small screw - jacks bore against the verticals of the shield and held boards against the face , except where it was actually being cut . The tunnel started from a vertical shaft 50 ft in diameter at the Rotherhithe end , and ...
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 |
Copyright | |
15 other sections not shown
Other editions - View all
Common terms and phrases
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 diameter E. J. HOLMYARD early eighteenth century engine England English Europe fallow farming figure fish France French furnace glass heat horizontal husbandry Ibid important improved inches industrial revolution introduced invention inventor J. F. Horrabin John 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 porcelain practical produced pump river road rollers rotation Rotherham plough salt screw sewers shaft ships silk Smeaton Staffordshire steam steam-engine steel stones sulphuric acid surface telegraph tion vertical ware water-wheels watermills Watt whales wheel wooden wrought iron