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A dichroscope measures the pleochroism, or refractive nature, of doubly refracting crystals. Wilhelm Karl Haidinger designed the basic form. Viktor Von Lang (1838-1921), a chemist who served as director of Physikalisches Kabinett in Vienna, introduced an improved version in 1881. Our example is of that sort. The inscription on the light shield reads “R. FUESS STEGLITZ-BERLIN.”
Ref: C. Leiss, Die Optischen Instrumente der Firma R. Fuess (Leipzig, 1899), pp. 179-182.
Currently not on view
Object Name
R. Fuess
place made
Germany: Berlin, Steglitz-Zehlendorf, Steglitz
overall: 38 cm x 25 cm x 28 cm; 14 31/32 in x 9 27/32 in x 11 1/32 in
overall: 15 1/8 in x 9 1/2 in x 9 1/16 in; 38.4175 cm x 24.13 cm x 23.01875 cm
ID Number
accession number
catalog number
Credit Line
Columbia University
See more items in
Medicine and Science: Physical Sciences
Data Source
National Museum of American History
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