Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 230
Fia. 261.—Balance wheelof watch. •Strictly speaking-, it is a point called the centre of oscillation (which nearly coincides withthe centre of gravity) whose distance from the point of suspension should be kept constant. 220 EXPANSION THROUGH HEAT in Fig. 261. The outer metal is the more…
Physics
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