Machinery and processes of the industrial arts, and apparatus of the exact sciences (1869)
Barnard, Frederick A. P. (Frederick Augustus Porter), 1809-1889 · Washington, Govt. print. off. · leaf 202
Coignard & Co.s Pump—section. of aspiration is L, which communicates with the space between thedrums O I. The form given to the pallets in this machine is spiral; theyare only two in number in each drum. As in the other pumps, theform of the helices is professedly such as to make the section of…
Machinery · Scientific apparatus and instruments
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