A descriptive and historical account of hydraulic and other machines for raising water, ancient and modern : with observations on various subjects connected with the mechanic arts: including the progressive development of the steam engine (1876)
Ewbank, Thomas, 1792-1870 · New York : Scribner, Armstrong · leaf 266
admission of air. These bellows were there-fore double acting, and consequently one of themwas etjual in its effects to two of those representedat No. Ill, which drive the air out only on the de-scent of the piston, whfreal these forced it into thefire both on ascending ar.d descending. Thus,when… … No. 114. Ooiihle Acting Bel-lows ol j^IailaLiiscar. Chap. 2.] On the Bellows among the Pcrurinns. 2j3 Ir.e trunk was expelled through C ; at the same time the flap of the upperjiistou was opened by its own weight and the air passing through it, andon the descent of B all the air in the upper part…
Pumping machinery
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