Dipping Refractometer
name: label: maker
content: Zeiss
notes: label: Description
content: 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.
label: Description
content: 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."
label: Location
content: Currently not on view
place: label: place made
content: Germany: Thuringia, Jena
topic: label: Subject
content: Optics
label: Subject
content: Chemistry
setName: label: See more items in
content: Medicine and Science: Physical Sciences
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content: Saccharimeters
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content: Measuring & Mapping
creditLine: label: Credit Line
content: Nicholas Grossman
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1982.0001.03
label: catalog number
content: 1982.0001.03
label: accession number
content: 1982.0001
objectType: label: Object Name
content: refractometer
physicalDescription: label: Measurements
content: 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