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 642
Fig. 3534 is a hollow-arm and Fig. 3535 a solid-arm wheel, as used on the Heald & Sisco pumps.The solid-arm wheel is used when the fluid contains stringy or tenacious matters; the hollow-arm 3533. 3537.
Mechanical engineering -- Dictionaries
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