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."

Maker: Zeiss

Location: Currently not on view

Place Made: Germany: Thuringia, Jena

Subject: OpticsChemistry

Subject:

See more items in: Medicine and Science: Physical Sciences, Saccharimeters, Measuring & Mapping

Exhibition:

Exhibition Location:

Credit Line: Nicholas Grossman

Data Source: National Museum of American History

Id Number: 1982.0001.03Catalog Number: 1982.0001.03Accession Number: 1982.0001

Object Name: refractometer

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

Guid: http://n2t.net/ark:/65665/ng49ca746ab-ed70-704b-e053-15f76fa0b4fa

Record Id: nmah_1305430

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