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)
By means of the two pii)es, A and B,extended up to the surface of the water, the foul air is removed andfresh air supplied ; as indicated by the arrows. The diving-bell affords another illustration of the impenetrabilityand compressibility of the air. 14^ Figure 36.—Atmospheric pressure shown by…
Physics · Astronomy
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