Zeiss Dipping Refractometer

Description
The dipping (or immersion) refractometer was designed by Carl Pulfrich, director of the Instrument Division of the Carl Zeiss Works in Jena. It consists of a telescope with a scale and micrometer screw, a prism that can be dipped into a liquid, and a compensator located between the prism and the objective lens.
Zeiss began marketing these instruments in 1899. Eimer & Amend was selling them by 1910, noting that they were used to examine milk serum and various aqueous, alcoholic, and ethereal liquids of a low refractive index. Records in the Carl Zeiss Archiv indicate that this example was delivered to a customer in Köln, Germany, in 1917. Zeiss continued manufacturing instruments of this sort until the factory was destroyed during World War II. This example is marked "CARL ZEISS JENA" and "Nr 12829" and "Germany."
Location
Currently not on view
maker
Zeiss
place made
Deutschland: Thüringen, Jena
Measurements
overall: 2 7/8 in x 2 3/4 in x 14 7/8 in; 7.3025 cm x 6.985 cm x 37.7825 cm
ID Number
1982.0001.03
catalog number
1982.0001.03
accession number
1982.0001
Credit Line
Nicholas Grossman
subject
Optics
Germany
Chemistry
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Saccharimeters
Data Source
National Museum of American History, Kenneth E. Behring Center

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