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)
Fig. 24. … 179. Figure 24. — Dia-phragm suction pump.—Thisconsists of a diaphragm, N, work-ing in a cylinder or open dish. Theouter edge of the diaphragm, E(made of leather), is fastened water-tight to the interior surface of thecylinder, in the manner shown, onthe central portion of which is se-cured a disk,…
Physics · Astronomy
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