Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 81
ect with thecylinder; an air-chamber is formed with a fittingand cap. The suction caused by the upwardmotion of the piston will draw water from a pail orcup through a rubber tube connected with the endfitting of the right-hand valve, then through thevalve to the cylinder; the downward motion ofthe… … UPLE MECHANICAL APPARATUS MADE BY BOYS UNDER FOURTEEN YEARS OF AGE.—DRAWN BY J. ABDON DONNEGAN. A NEW VIEW OF THE MOON. 551 By the removal of one pane of glass from a win-dow facing south, the apparatus shown in Figure 15may be used, like a magic lantern, to project trans-parencies, in a darkened…
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