Altitude and Azimuth Instrument
name: label: maker
content: Buff & Berger
notes: label: Description
content: This instrument came from 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."
label: Description
content: 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.
label: Description
content: Ref: Buff & Berger, <i>Hand Book and Illustrated Catalogue of the Engineers' and Surveyors' Instruments</i> (Boston, 1890), p. 129.
label: Location
content: Currently not on view
place: label: place made
content: United States: Massachusetts, Boston
setName: label: See more items in
content: Medicine and Science: Physical Sciences
label: See more items in
content: Surveying and Geodesy
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content: Measuring & Mapping
publisher: label: Related Publication
content: Buff & Berger. Hand-book and Illustrated Catalogue of the Engineers' and Surveyors' Instruments, Made by Buff & Berger
creditLine: label: Credit Line
content: Princeton University
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1983.0245.01
label: accession number
content: 1983.0245
label: catalog number
content: 1983.0245.01
objectType: label: Object Name
content: altitude and azimuth instrument
physicalDescription: label: Measurements
content: overall: 11 1/2 in; 29.21 cm
label: Measurements
content: horizontal circle: 8 in; 20.32 cm
label: Measurements
content: vertical circle: 5 1/4 in; 13.335 cm
label: Measurements
content: telescope: 11 1/2 in; 29.21 cm
label: Measurements
content: level: 6 in; 15.24 cm
label: Measurements
content: 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