Hydrometer

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HYDROMETER. An instrument for measuring the density of fluids; being immersed in fluids, as in water, brine, beer, brandy, &c., it determines the proportion of their densities, or their specific gravities, and thence their qualities.
     2. By, the Act of Congress of January 12, 1825, 3 Story's' Laws U. S. 1976, the secretary of the treasury is authorized, under the direction of the president of the United States, to adopt and substitute such hydrometer as he may deem best calculated to promote the public interest, in lieu of that now prescribed by law, for the purpose of ascertaining the proof of liquors; and that after such adoption and substitution, the duties imposed by law upon distilled spirits shall be levied, collected and paid, according to the proof ascertained by any hydrometer so substituted and adopted.

References in periodicals archive ?
A usable and dependable model for estimating the suspended sediments in the Karaj River was found, using the well-known sediment conveyance equation and long-term data for hydrometrical station in the Karaj River watershed area.
Optimization of the relationship between water flow rates and suspended sediment discharge rates in hydrometrical stations of Gorganrood River.
For all the 14 hydrometrical station useful from Romanian side of Prut basin, with long period of observation and measurements (at least 39 years), after the drawing of empirical assiguration curve and after it was found the characteristical coefficients using the inclination coefficient's method and Pearson's formula, variation coefficient calculated (Cv) presents very large deviations ([+ or -] 0.20, it means [+ or -] 36.16%).