specific-gravity bottle

specific-gravity bottle

[spə′sif·ik ¦grav·əd·ē ‚bäd·əl]
(engineering)
A small bottle or flask used to measure the specific gravities of liquids; the bottle is weighed when it is filled with the liquid whose specific gravity is to be determined, when filled with a reference liquid, and when empty. Also known as density bottle; relative-density bottle.
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