A History of Technology: The industrial revolution, c. 1750 to c. 1850Clarendon Press, 1958 |
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Page 86
... removed . One important point , which was early noted , is that the line of the removed pillars or fallen roof should make an angle of about 45 ° with the main natural ' slips ' or breaks in the roof . By this means the danger of an ...
... removed . One important point , which was early noted , is that the line of the removed pillars or fallen roof should make an angle of about 45 ° with the main natural ' slips ' or breaks in the roof . By this means the danger of an ...
Page 87
... removed bodily in line . As the coal is removed any stone available is built into dry stone walls or packs some 6 to 21 ft wide , arranged in parallel lines at right - angles to the advancing wall or face . The pur- pose of these walls ...
... removed bodily in line . As the coal is removed any stone available is built into dry stone walls or packs some 6 to 21 ft wide , arranged in parallel lines at right - angles to the advancing wall or face . The pur- pose of these walls ...
Page 124
... removed at this time , the ore being first fused with alkaline salts : in Oxland's process crude soda was added , but by 1850 the more economical saltcake ( sodium sulphate ) was being used in Cornwall . When the tin ore was ready for ...
... removed at this time , the ore being first fused with alkaline salts : in Oxland's process crude soda was added , but by 1850 the more economical saltcake ( sodium sulphate ) was being used in Cornwall . When the tin ore was ready for ...
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