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Buff & Berger Altitude and Azimuth Instrument

Buff & Berger Altitude and Azimuth Instrument

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This belonged to the John C. Green Astronomical Observatory at Princeton University. New, it cost $680. The horizontal circle is silvered, graduated to 20 minutes, and read by opposite verniers with magnifiers and ground glass plates to 20 seconds. The vertical circle is silvered, graduated to 20 minutes, and read by opposite verniers with magnifiers and ground glass plates to single minutes. The telescope has a filar micrometer eyepiece; the attached level has a micrometer adjustment. The inscription reads "Buff & Berger, Boston No. 159."
George L. Buff and Christian Louis Berger went into business in Boston in 1871, manufacturing "all kinds of surveying, astronomical, mathematical and philosophical instruments." Buff & Berger was remarkably successful, attracting numerous customers, and winning awards at state and national exhibitions. The firm was dissolved in 1898, and succeeded by Buff & Buff and by C. L. Berger & Sons.
Ref: Buff & Berger, Hand Book and Illustrated Catalogue of the Engineers' and Surveyors' Instruments (Boston, 1890), p. 129.
Currently not on view
Object Name
altitude and azimuth instrument
Buff & Berger
place made
United States: Massachusetts, Boston
overall: 11 1/2 in; 29.21 cm
horizontal circle: 8 in; 20.32 cm
vertical circle: 5 1/4 in; 13.335 cm
telescope: 11 1/2 in; 29.21 cm
level: 6 in; 15.24 cm
overall; in case: 13 in x 11 1/4 in x 10 1/2 in; 33.02 cm x 28.575 cm x 26.67 cm
ID Number
accession number
catalog number
Credit Line
Princeton University
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Surveying and Geodesy
Data Source
National Museum of American History
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