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An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth (1888)

Gwilt, Joseph, 1784-1863, Papworth, Wyatt Angelicus Van Sandau, 1822-1894 · London Longmans, Green · leaf 373

An illustration from An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth, 1888, leaf 373
have 20 X 3-1416 X 2= 125-664, the tircuinfereiice ofthe power; and 125-664 to {, or 251-;i28 to 1, isthe toice of the screw alone. Again, 18 : 2 or 9:1,being the proportion of the wheels to the pinions, andthere being three of them, 93 : 1 or 729 : 1 is thepower gained by the wheels. 1329.…

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