Franz Schmidt & Haensch Saccharimeter

Franz Schmidt & Haensch Saccharimeter

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Usage conditions apply
Half-shadow polariscope on a trestle stand, probably made shortly before World War I. The inscriptions read: "Franz Schmidt & Haensch. Berlin, S." and "No. 6883" and "D.R. Pat. No 82523." The referenced German patent, dated 1905, describes the polarizer which enables the observer to equalize the darkness (rather than the color) of the various parts of the image. A dust-proof housing encloses the quartz wedge compensator (which is moved by the vertical rod with milled head) and the linear scale (which reads from -25 to +100 degrees Ventzke). The (missing) observation tube is 400 mm long. This was used at the Virginia Polytechnic Institute.
Ref: Franz Schmidt & Haensch, “Halbschatten-Polarisationsapparat,” German patent 82523 (1895).
Arthur H. Thomas Co., Laboratory Apparatus (Philadelphia, 1906), p. 320.
Arthur H. Thomas Co., Laboratory Apparatus and Reagents (Philadelphia, 1914), p. 430.
Currently not on view
Object Name
Franz Schmidt & Haensch
place made
Germany: Berlin, Berlin
Physical Description
brass (overall material)
overall: 31 1/4 in x 9 in x 16 1/8 in; 79.375 cm x 22.86 cm x 40.9575 cm
overall: 16 in x 9 in x 29 3/8 in; 40.64 cm x 22.86 cm x 74.6125 cm
ID Number
catalog number
accession number
Credit Line
Virginia Polytechnic Institute
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Data Source
National Museum of American History
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