mercury hydrometer
Date1890-1930
Inventory Number4968
ClassificationHydrometer
Subject
Maker
American
?
User
Department of Physics, Harvard University
founded 1884
Cultural Region
Dimensions12.6 x 1.8 cm (4 15/16 x 11/16 in.)
case: 2.8 x 14.2 x 2.8 cm (1 1/8 x 5 9/16 x 1 1/8 in.)
case: 2.8 x 14.2 x 2.8 cm (1 1/8 x 5 9/16 x 1 1/8 in.)
Material
Accessorieswooden case
DescriptionA hydrometer consisting of a glass tube with three distinct sections: 1) A thin stem with a rolled piece of paper inside that has a scale graduated from -5 at the top to 20 at the bottom. 2) a large, egg-shaped bulb filled with air that connects to the stem at the top and has a straight narrow neck at its other end which is painted red and leads to the third section. 3) a smaller bulb in the shape of an arrowhead that is filled with mercury.
The hydrometer is contained in an elegant wood case that follows the contours of the instrument.
The hydrometer is contained in an elegant wood case that follows the contours of the instrument.
Signedunsigned
ProvenanceFrom the Department of Physics, Jefferson Laboratory, Harvard University.
German
Date: circa 1850
Accessories: cylindrical cardboard case with a pattern of brown and yellow flowers
Object number: DW0793
American
Date: 1870-1920
Object number: 1998-1-0293
Eastern Salt Company
Date: 1900-1920
Accessories: carrying case
Object number: 1998-1-0297
Dr. H. Geissler, Nachfolger Franz Müller
Date: 1890-1920
Accessories: green cardboard case
Object number: 4445
Dr. H. Geissler, Nachfolger Franz Müller
Date: 1900-1920
Accessories: green cylindrical cardboard case
Object number: 4446
Dr. H. Geissler, Nachfolger Franz Müller
Date: 1900-1920
Accessories: blue cylindrical cardboard case
Object number: 4447
R. G. Greiner
Date: circa 1850
Accessories: black cylindrical cardboard case
Object number: DW0792
American
Date: 1890-1920
Accessories: cardboard case with a black and green mottled surface
Object number: 4442
American
Date: 1890-1920
Accessories: cardboard case with a black and brown mottled surface
Object number: 4441
American
Date: 1890-1920
Accessories: cardboard case with a black and brown mottled surface
Object number: 4440
American
Date: 1890-1920
Accessories: cardboard case with a black and brown mottled surface
Object number: 4443