Natural philosophy. being a hand-book of chemical physics, or, The physics of heat, light and electricity (1869)
Sangster, John Herbert, 1831-1904 · Montreal : J. Lovell · leaf 221
ound round with wire; at ais a keeper fastened to a lever, a I, which works on a fulcrum, at d; theother end of the lever bears a steel point, s, which serves as a pen. At c is aclock work arrangement for the purpose of drawing a narrow strip of paper,pp, in the directiou of the arrows. W W are the… … a, to its poles; and tlie other end of the lever, /, risinj; up, the point s ispressed against the moving paper and makes a mark. When the leverfirst moves it sets the clock macliiiiery in motion, and the bell, 6, rings togive notice to the observer. The movements of the lever a I are theexact…
Physics
Internet Archive · Western University Libraries · Public Domain Mark 1.0. Free to use for anything.
