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 83
ting the mechanicalproperties of air ? For what is the Air-Pump employed ? 77 skill on the part of the operator, will be often attended by ageneral failure, however perfect be the minor instruments of apneumatic set. As elementary works upon natural philosophyseldom give any serviceable hints in… … 64. Description of the Air-Pump.^—Fig. 44 shows a formof the American Lever Exhaust-Pump^ now generally used * If an air-pump or diagram is at hand, the pupil may describe the partsof the instrument from this. What is said of its importance in pneumatic illustrations ?7* 78 AIR-PUMP. in the larger…
Physics
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![An illustration from Essai de physique, par Mr. Pierre van Musschenbroek ... avec une description de nouvelles sortes de machines pneumatiques, et un recueil d'expériences par Mr. J. v[an] M[usschenbroek] Traduit du hollandois par Mr. Pierre Massuet .. (1751)](https://img.insideoutlibrary.com/img/200/ia-essaidephysiquep01muss-480-77.webp)
