Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
fthe cylinder, then close the faucet and draw thepiston up, and the small quantity of air v/illexpand and fill the entire cylinder. It is found that the air, when its usual pres-sure is diminished, expands in the same ratiothat it condenses; that is, if half the pressureis removed from a given… … 128. Figure 27.—Air-pump, receiver, and vacuum.— The air-pump is an apparatus to draw the air out of vessels. The PNEUMATICS. 9{> vessel so exhausted is called a receiver; and the space within, thusdeprived of air, is termed a vacuian. In the figure, the inverted glass vessel, W, is the…
Physics · Astronomy
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