Mine-drainage, a treatise on direct-acting underground steam-pumping machinery
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Mine-Drainage, a Treatise on Direct-Acting Underground Steam-Pumping Machinery
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action actuated admitted applied arrangement attached boilers bottom chamber closing cloth coal collieries communication compound engine condenser connected considerable consists construction contains Cornish engine cost cylinder delivery diameter Differential direction double-acting duty economy Edition effective elevation exhaust expansion feet fitted fixed forcing gallons per hour give given greater head height high-pressure Illustrations inches kind latter length lever lifts load machine machinery main-valve makers means Messrs mines minute motion moving necessary operations ordinary pair passes PATENT performed pipe piston piston-rod placed Plates plunger port practical pressure Price principle pumping engines quantity of water raise ram-pump reference shaft shown shows side simple sizes slide-valve space Special speed square steam steam-cylinder steam-pump stroke strokes per minute suction supplied surface Tables taken tappets underground valve valve-gear varying vertical water-cylinder
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