A descriptive and historical account of hydraulic and other machines for raising water (1850)
Ewbank, Thomas, 1792-1870 · New York, Bangs, Platt, & Co. · leaf 276
rthe admission of air. These bellows were there-fore double acting, and consequently one of themwas equal in its effects to two of those representedat No. Ill, which drive the air out only on the de-scent of the piston, whereas these forced it into thefire both on ascending and descending.… … No. 114. Double Acting Bellows of Madagascar. Chap. 2.] On the Bellows among the Peruvians. 253 the trunk was expelled through C ; at the same time the flap of the upperpiston was opened by its own weight and the air passing through it, andon the descent of B all the air in the upper part of the…
Pumping machinery
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