Pycnometer

Pycnometer

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Description
A pycnometer (sometimes termed a Geissler specific gravity bottle) is a glass flask provided with an accurate and delicate thermometer, that determines the density of a liquid and how it varies with temperature. The form was devised in 1859 by the German glassworker, Heinrich Geissler (1814-1879) and the Russian chemist Dmitri Ivanovich Mendeleev (1834–1907). The inscription on this example reads "25 ML / 20° C / K / USA / 1560."
The “Jenaer Normalglass Germany” inscription on the thermometer refers to the Jenaer Glaswerk Schott and Genossen, established in 1884.
Location
Currently not on view
Object Name
pycnometer
Physical Description
glass, ?, transparent (overall material)
ID Number
ZZ.RSN82816X02
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Medicine and Science: Medicine
Data Source
National Museum of American History
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