A text-book on chemistry. For the use of schools and colleges (1866)
Draper, Henry, 1837-1882 · New York, Harper & brothers · leaf 261
s a piece of glass tube, c,drawn to a narrow jet at one end, butopen at the other, by placing the fingerover the opening and introducing it intothe mouth, the air, by the action of thetongue and muscles of the mouth, may bedrawn out to a great extent; and when the exhaustionhas been carried as far… … WEIGHT OF AIR. 249 Fig. 222. bottle be turned upside down, as at e, in some water,and the finger removed, a fountain in vacuo is formed.The pressure of the air depends on the fact that it isa heavy body, as may be provedby weighing it directly. Leta light glass flask, a, Fig. 222,fitted with a…
Chemistry · Physics
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