A text book of elementary mechanics, for the use of colleges and schools (1881)
Dana, Edward Salisbury, 1849-1935 · New York, J. Wiley & sons · leaf 237
FlG.148. As the spring unwinds its force diminishes; but by meansof the fusee it is made to act on a continually increasinglever-arm, and by a proper adjustment the moment, orturning power of the force, can be kept constant. … Fig. 149.
Mechanics
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
