Pfister Transit

Description
This is marked "Herm. Pfister for L. M. Prince Cincinnati O." Herman Pfister (1847-1911) was born in Switzerland. By 1870, he was making surveying and engineering instruments in Cincinnati, Ohio. Louis M. Prince (1850-1918) opened a store in Cincinnati in 1873, selling a wide variety of optical and mathematical instruments. In this example of Pfister's work, the horizontal and vertical circles are silvered, graduated every 30 minutes of arc, and read by vernier to single minutes. There are stadia wires in the telescope, and a clamp and tangent to the telescope axis.
Ref: Charles Smart, The Makers of Surveying Instruments in America Since 1700 (Troy, N.Y., 1962), p. 131; and vol. 2 (1967), p. 234.
Location
Currently not on view
maker
Pfister, Herman
place made
United States: Ohio, Cincinnati
Measurements
overall: 12 1/2 in; 31.75 cm
horizontal circle: 7 in; 17.78 cm
vertical circle: 5 in; 12.7 cm
needle: 5 in; 12.7 cm
telescope: 10 in; 25.4 cm
hanging level: 5 in; 12.7 cm
ID Number
PH*334141
catalog number
334141
accession number
310551
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Surveying and Geodesy
Data Source
National Museum of American History, Kenneth E. Behring Center

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