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 105
wo strong men may not be able to separate them. To prove that these hemi-spheres are now held together by the force of the air, let them be again screwed to the pump-plate, and covered by a bell-glass provided with a sliding-rod and hook, as seen in Fig. 78. Attach the hook of the rod to the…
Physics
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
