The elements of natural philosophy : copiously illustrated by familiar experiments and containing descriptions of instruments, with directions for using : designed for the use of schools and academies (1856)
Sprague, A. W. (Alfred White), 1821-1891 · Boston : Phillips, Sampson & Company · leaf 112
the same lawsas the more dense fluids, pressing inall directions, upwards as well asdownwards. Experiment a.— Draw the pistonto the bottom of the glass cylinder ofthe upward pressure apparatus^Fig. 88, and attach a fifty-six, orgreater weight; not, however, so asto hang at all on the piston when at… … In what directions does the air exert its pressure ? How may this upwardpressure of the air be shown by Fig. 88 ? THE BAROMETER. 107 above, taking up also the attached weight. Now pull down uponthe leather strap and let go the hand; the piston and weightwill rise and tilt on the air several times,…
Physics
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
