A natural philosophy : embracing the most recent discoveries in the various branches of physics, and exhibiting the application of scientific principles in everyday life .. (1899)
Quackenbos, G. P. (George Payn), 1826-1881 · New York, Cincinnati [etc.], American book company · leaf 171
ll.—The impen-etrability of air is shown by the Diving-bell, represented in Fig. 175. A C is alarge iron vessel, shaped somewhat likean inverted tumbler, and attached to achain, by which it is let down in thewater. As the vessel descends, the airin it is condensed by the upward pres-sure of the… … THE DIVING-BELL. what are the principles of Pneumatics most frequently exhihited, and why:891. What is Air? How far does it extend from the earths surface? What does itconstitute? 392. What is a Vacuum? What did the old philosophers say, and wh/?893. What proves the air to be material ? S94. What…
Physics
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