Buerker Colorimeter

Description
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."
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.
Ref.: E. Leitz, Inc., Leitz Microscopes (New York, 1929), p. 228.
Location
Currently not on view
Object Name
colorimeter
date made
1925-1960
maker
Leitz
Physical Description
metal (overall material)
wood (overall material)
Measurements
mirror: 2 in; 5.08 cm
box: 12 in x 7 1/4 in x 8 in; 30.48 cm x 18.415 cm x 20.32 cm
overall: 10 1/4 in; 26.035 cm
place made
Deutschland: Hessen, Wetzlar
ID Number
CH*318272
catalog number
318272
accession number
231262
subject
Color
Optics
Chemistry
See more items in
Medicine and Science: Chemistry
Measuring & Mapping
Saccharimeters
Data Source
National Museum of American History, Kenneth E. Behring Center

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