Buerker Colorimeter
date: label: date made
content: 1925-1960
name: label: maker
content: Leitz
notes: label: Description
content: This is a modified version of the colorimeter devised by Jules Duboscq in Paris. E. Leitz, Inc., the American agents for the optical instruments manufactured by Ernst Leitz in Wetzlar, Germany, was selling this form by 1925 and describing it as a "Compensation Colorimeter and Hemoglobinometer involving the 'Buerker' Principle." Karl Buerker, the Director of the Physiological Institute at the University of Giessen, had published an account of a colorimeter with a "Huefner" prism in 1923. This prism, designed by Albrecht Huefner, brought the images of the two cups together in the eyepiece and insured that "both halves in the comparison field are of identical shade, obviating the minutest error which is so commonly found with colorimeters of other manufacturers."
label: Description
content: This example is marked "Ernst Leitz / Wetzlar / No 255" and "Germany." New it cost $125. The Baker Laboratory of Chemistry at Cornell University donated it to the Smithsonian in 1960.
label: Description
content: Ref.: E. Leitz, Inc., <i>Leitz Microscopes</i> (New York, 1929), p. 228.
label: Location
content: Currently not on view
place: label: place made
content: Germany: Hesse, Wetzlar
topic: label: Subject
content: Color
label: Subject
content: Optics
label: Subject
content: Chemistry
setName: label: See more items in
content: Medicine and Science: Chemistry
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content: Saccharimeters
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content: Measuring & Mapping
creditLine: label: Credit Line
content: Cornell University
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: CH.318272
label: catalog number
content: 318272
label: accession number
content: 231262
objectType: label: Object Name
content: Colorimeter
label: Object Name
content: colorimeter
physicalDescription: label: Physical Description
content: metal (overall material)
label: Physical Description
content: wood (overall material)
label: Measurements
content: mirror: 2 in; 5.08 cm
label: Measurements
content: box: 12 in x 7 1/4 in x 8 in; 30.48 cm x 18.415 cm x 20.32 cm
label: Measurements
content: overall: 10 1/4 in; 26.035 cm
label: Measurements
content: overall in box: 12 5/8 in x 7 3/8 in x 9 in; 32.0675 cm x 18.7325 cm x 22.86 cm