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 90
be wrenched off where it enters thehole. When the air is admitted after anexhaustion, the light bodies should be allowed to fall to theother end of the tube, lest they be injured by the rush of airthrough the stop-cock.* 71. The following cuts present accurate views of some of thjmore important… … SCREW CONNECTIONS. 85 tween the various parts of a pneumatic apparatus. To these weshall have frequent occasion to refer in the following pages. Fig. 51 Fig. 53.
Physics
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