glass hydrometer
Date: 1902-1914
Inventory Number: 4471
Classification: Hydrometer
Subject:
Maker: German
Supplier: Scientific Materials Company (1902 - 1925)
Cultural Region:
Place of Origin:
Dimensions:
1.9 x 31.9 x 1.9 cm (3/4 x 12 9/16 x 3/4 in.)
Description:
A glass tube with two identifiable sections. A first, very narrow one that takes roughly half of the tube's length and contains a paper scale, and a wider bulb that is partly filled with air and has about one-fourth of its length filled with lead shot at its extreme end.
Part of an original set of 20, now 22 including three duplicates and one missing.
Its scale goes from 1.360 to 1.420. The hydrometer is numbered "12".
Part of an original set of 20, now 22 including three duplicates and one missing.
Its scale goes from 1.360 to 1.420. The hydrometer is numbered "12".
Signedon scale: Germany, Scientific Materials Company, Pittsburgh
Inscribedon tube: Normal Araometer fuer Gewicht Temp 15°C
FunctionHydrometers are used to determine a liquid's specific gravity and are used by letting them float upright in the liquid and registering the point on the scale reached by the liquid's surface.
Curatorial RemarksThe dating of this instrument comes from the fact that at the start of World War I, supplies were difficult to get from Europe, and of course supplies from Germany were off-limit.
For storage information, see inv. number 4479.
For storage information, see inv. number 4479.
ProvenanceFrom the Department of Physics, Harvard University.
