Twaddell's hydrometer
Twaddell Twad"dell, n., Twaddell's hydrometer Twad"dell's hy*drom"e*ter [After one Twaddell, its inventor.] A form of hydrometer for liquids heavier than water, graduated with an arbitrary scale such that the readings when multiplied by .005 and added to unity give the specific gravity. [Webster 1913 Suppl.]

The Collaborative International Dictionary of English. 2000.

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  • Twaddell — Twad dell, n., Twaddell s hydrometer Twad dell s hy*drom e*ter [After one Twaddell, its inventor.] A form of hydrometer for liquids heavier than water, graduated with an arbitrary scale such that the readings when multiplied by .005 and added to… …   The Collaborative International Dictionary of English

  • Hydrometer — Not to be confused with Hygrometer. Hydrometer from Practical Physics Schematic drawing of a hydrometer. The lower the densi …   Wikipedia

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