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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)

Johnson, Frank G., 1835- · Chicago, A.H. Andrews · leaf 131

An illustration from 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, leaf 131
tate of rest, the ball-valve, L, by its weight,Avill drop down and again open the aperture, H, when the same opera-tion will be repeated, and so on. Suction Pvimps. 173. Figure 18.—The principle of suction pumps.—The operation of suction-pumps, so far as regards the suction, consists inproducing,… … Fig. 19.

Physics · Astronomy

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