glass hydrometer
Date1870-1890
Inventory Number4453
ClassificationHydrometer
Subject
Maker
Alvergniat Frères
fl. 1858 - 1890
Cultural Region
Place of Origin
Dimensions28 x 2 cm (11 x 13/16 in.)
case: 2.8 x 36.4 x 2.8 cm (1 1/8 x 14 5/16 x 1 1/8 in.)
case: 2.8 x 36.4 x 2.8 cm (1 1/8 x 14 5/16 x 1 1/8 in.)
Material
Accessoriescarrying case
DescriptionA hydrometer consisting of a thin glass tube, with an elongated air bulb near its bottom, weighted by a bulb filled 1/3 with mercury. The upper, thinner part of the tube has a scale calibrated from 1000 to 680.
Contained in a wooden cylindrical case.
Contained in a wooden cylindrical case.
Signedopposite scale: Alvergniat F.res, 10 Rue de la Sorbonne
Inscribedon bulb opposite scale: Densimètre pour liquides plus légers que l'Eau
on case: No. 141
FunctionThis hydrometer measures a liquid's density in Baumé units. One would let it float in the liquid to be measured and the point on the scale reached by the liquid's surface would be its density.
L. E. Knott Apparatus Company
Date: 1896-1920
Accessories: carrying case
Object number: 4450
R. G. Greiner
Date: circa 1850
Accessories: black cylindrical cardboard case
Object number: DW0792
Alvergniat Frères
Date: circa 1890
Accessories: inside an old wooden box with space for two thermometers of this kind, but with only this one present. Other contents and inscriptions of box described in Inscriptions.
Object number: 1998-1-0420
Eastern Salt Company
Date: 1900-1920
Accessories: carrying case
Object number: 1998-1-0297
American
Date: 1870-1920
Object number: 1998-1-0293
French
Date: 1890-1910
Accessories: blue cylindrical cardboard case
Object number: 4448
