A History of Technology: The industrial revolution, c. 1750 to c. 1850 |
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Page 123
At frequent intervals the slag was separated , the lead was run off into the vessel seen on the right of figure 71 , and fresh fuel and ore were added . The process was continued without interruption for about 15 hours , when the hearth ...
At frequent intervals the slag was separated , the lead was run off into the vessel seen on the right of figure 71 , and fresh fuel and ore were added . The process was continued without interruption for about 15 hours , when the hearth ...
Page 137
The most important developments in the extraction of silver , however , were two processes introduced by H. L. Pattinson ( 1796-1858 ) and Alexander Parkes ( 1813-90 ) respectively for the removal of the metal from lead .
The most important developments in the extraction of silver , however , were two processes introduced by H. L. Pattinson ( 1796-1858 ) and Alexander Parkes ( 1813-90 ) respectively for the removal of the metal from lead .
Page 138
was recharged and the process was repeated until the pot of enriched lead was nearly full . This enriched charge was heated , and the process was repeated until ' lead riches ' , with 300 oz silver per ton , were obtained .
was recharged and the process was repeated until the pot of enriched lead was nearly full . This enriched charge was heated , and the process was repeated until ' lead riches ' , with 300 oz silver per ton , were obtained .
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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 | |
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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 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