Animal locomotion, or Walking, swimming, and flying, with a dissertation on aëronautics (1874)
Pettigrew, James Bell, 1834-1908 · New York, D. Appleton & company · leaf 137
er in the clock—thependulum being used merely to regulate the movements produced by thedescent of the leads. In watches, the onus of motion is thrown upon aspiral s])ring ; and it is Avorthy of remark that the mechanician has sei e lupon, and ingeniously utilized, two forces largely employed in the… … Fig. 55. If I take two primary feathers and fix them in an ordinarycork, as represented at fig. 55, and allow the apparatus todrop from a height, I find the cork does not fa>ll verticallydownwards, but downwards and forwards in a curve. Thisfollows, because the feathers a, I are twisted flexible…
Animal locomotion · Aeronautics
Internet Archive · Biodiversity Heritage Library · Public Domain Mark 1.0. Free to use for anything.
