Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 21
a quantity of wateris poured in until the tubes are about half full, and the instrument being thenheld perpendicularly, with its mouth exposed to the wind, the water will be depressed in the tube ab, and proportionally elevated in the tube cd; and the dis-tance between the surfaces in the two tubes…
Mechanical engineering · Mechanics · Engineering
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