| 单词 | specific gravity bottle |
| 释义 | > as lemmasspecific gravity bottle (also flask) d. specific gravity beads (also bulbs): small hollow glass spheres used in determining the specific gravity of a liquid (see quot. 1884). specific gravity bottle (also flask): an instrument for determining the specific gravity of a liquid by a comparison of the weight of a given volume of it with that of an equal volume of a standard liquid under the same conditions of temperature and pressure; a pycnometer. specific gravity determination: ascertaining the specific gravity of certain substances for the purposes of investigation or diagnosis. ΘΚΠ the world > matter > constitution of matter > density or solidity > [noun] > specific gravity > device to measure specific gravity > of liquids waterpoise1660 hydrometer1675 citrometer1823 litrameter1826 Twaddell1853 pycnometer1858 specific gravity beads (also bulbs)1863 1863 E. Atkinson tr. A. Ganot Elem. Treat. Physics §99 Specific gravity flask. 1881 E. Atkinson tr. A. Ganot Elem. Treat. Physics (ed. 10) §122 The pyknometer or specific gravity bottle. 1884 A. Daniell Text-bk. Princ. Physics 198 Specific-gravity bulbs. Bulbs are sold which are known to float without rising or sinking in liquids of the sp. gr. marked in numbers upon them. A number of them are thrown into the liquid; those which bear too high a number sink, those which are too light rise; the one exactly corresponding, if there be one, is at rest anywhere in the fluid. 1899 J. Cagney tr. R. von Jaksch Clin. Diagnosis (ed. 4) vii. 326 The approximate sugar content of the urine..being ascertained by means of a specific gravity determination. < as lemmas |
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