Webster's 1828 Dictionary
HYDROMETRY
n.[Gr. water, and measure. ] The art of measuring, or the mensuration of the gravity, density, velocity, force, etc. of fluids, and the strength of rectified spirits.
Webster's 1913 Dictionary
HYDROMETRY
Hy *drom "e *try, n. Etym: [Cf. F. hydromètrique.]
1. The art of determining the specific gravity of liquids, and thence the strength of spirituous liquors, saline solutions, etc.
2. The art or operation of measuring the velocity or discharge of running water, as in rivers, etc.
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