from The Century Dictionary.
- noun An instrument for measuring the specific gravity of liquids; a hydrometer. Also spelled
from the GNU version of the Collaborative International Dictionary of English.
- noun (Physics) An instrument for measuring the specific gravity of fluids; a form hydrometer.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Any device used to measure the
specific gravityof liquids or the densityof solids.
Sorry, no etymologies found.
The areometer can only be just, when the atmosphere is temperate; that is, at 55° Fahrenheit, or 10° Reaumur.
(NaHO), marking 1.30 to 1.45 by the Baumé areometer, the solvent being water.
The variations in cold or heat influence liquors; they acquire density in the cold, and lose it in the heat: hence follows that the areometer does not sink enough in the winter, and sinks too much in the summer.
Water being graduated at 10° in the areometer, it results from thence that the spirit going to 20°, is in reality only 10° lighter than water; and the alcohol gaaduated [TR: graduated] at 35°, is only 25° above distilled water.
It is easy to conceive how weak a mixture, 25 parts of water to one of whiskey, must be; thus the produce of the first distillation is only at 11° or 12° by the areometer, the water being at 10°.
For that reason, there are in Europe inspectors, whose duty it is to weigh spirits, particularly _brandy_: for that purpose they make use of the areometer and the thermometer.
Reaumur, sinks the areometer 1/8 of a degree more; and that 1° less of heat, had the contrary effect: thus the heat being at 18° of Reaumur, the spirit marking 21° by the areometer, is really only at 20°.
M. Gobley has invented an instrument which he calls an areometer, to detect this fraud.
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An areometer, to be good, must be proved with distilled water, at the temperature of 55°.
The cold being at 8° below temperate, the spirit marking only 19° by the areometer, is in reality at 20°. 2-1/4 of Fahrenheit corresponding to 1° of Reaumur, occasion in like manner a variation of 1/8 of a degree: thus, the heat being at 78-1/2°, the spirit thus marking 21°, is only at