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 240
DUBOYSS WATER METER. 223 Fiff. 70. … section in Fig. 70. The contrivance consists of two basin-shaped vesselsapplied to each other so as to enclose between them a cavity, whichis divided by a flexible diaphragm of India-rubber. To the central partof this diaphragm is fixed a weight D with a double metallic disk, includ-ing between its…
Machinery · Scientific apparatus and instruments
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