Alidade

Description:

This alidade belonged to Columbia University. Its vertical arc, which extends 35 degrees either way, is graduated to 30 minutes and read by vernier to 2 minutes. The base has a skeletal structure, making it light and stiff. There is a separate striding level and trough compass. The "BUFF & BERGER BOSTON 2157" inscription refers to a firm that traded, as such, from 1871 to 1898.

Ref: Buff & Berger, Hand-Book and Illustrated Catalogue of the Engineers' and Surveyors' Instruments (Boston, 1890), p. 104b.

Date Made: 1871-1898

Maker: Buff & Berger

Location: Currently not on view

Place Made: United States: Massachusetts, Boston

See more items in: Medicine and Science: Physical Sciences, Surveying and Geodesy, Measuring & Mapping

Exhibition:

Exhibition Location:

Related Publication: Buff & Berger. Hand-book and Illustrated Catalogue of the Engineers' and Surveyors' Instruments, Made by Buff & Berger

Credit Line: Columbia University

Data Source: National Museum of American History

Id Number: PH.335213Catalog Number: 335213Accession Number: 317998

Object Name: alidade

Measurements: telescope: 17 in; 43.18 cmoverall: 5 in x 22 3/4 in x 10 1/4 in; 12.7 cm x 57.785 cm x 26.035 cm

Metadata Usage: CC0

Guid: http://n2t.net/ark:/65665/ng49ca746a5-bb1e-704b-e053-15f76fa0b4fa

Record Id: nmah_764353

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