A Treatise On the Cornish Pumping Engine

advantage air pump applied arrangement atmospheric engine average duty beam bottom Boulton and Watt bucket bushel of coals calculated condenser consequence considerable construction consumed Cornish boiler Cornish engine Cornwall cylinder cylinder engine Davies Gilbert Dolcoath equilibrium valve erected evaporation exhaustion valve experiments Farey fathoms feet fig figures filled find fines fire fire-place first fixed flow friction fuel heat high-pressure steam Hornblower improvement in-door stroke inches diameter increased invention Jonathan Hornblower length of stroke lever machine machinery main rod means Messrs millions mines motion Old Ford opening out-door stroke patent performed pipe pit-work Plate plunger plunger pump Poldice present pressure of steam pump rods purpose quantity of water raised reported resistance result Richard Trevithick shaft single-acting Smeaton specification square inch steam engine steam valve sufficient suflicient surface tappet temperature Trevithick trial tube valve is closed velocity Watt's Watt’s engine weight Wheal whole Wicksteed Woolf