A natural philosophy : embracing the most recent discoveries in the various branches of physics, and exhibiting the application of scientific principles in everyday life .. (1899)
Quackenbos, G. P. (George Payn), 1826-1881 · New York, Cincinnati [etc.], American book company · leaf 128
Fig. 132. … CBOWN-WHEEL AND PINION. HAND-MILL. Fig. 131 represents the contrate-whe^l and pinion of a watch. B, whoseteeth run the same way as its axis, is a crown-wbeel. A, whose teeth are atright angles to its axis, is a spur-wheel. Fig. 132 shows how a crown-wheel worked by a winch is combined witha trundle…
Physics
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