Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 644
nects only with the induction-passage D. A small brassair-check valve is screwed into the neck of each cham-ber A A, and one into the vacuum-chamber J, so thattheir stems hang downward. The check-valve in theneck of each chamber A A allows a small quantity ofair to enter above the water, to prevent…
Mechanical engineering -- Dictionaries
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