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Expedition Alidade with Case

Expedition Alidade with Case
The rectangular base (blade) features two different types of spirit levels and a trough compass. Manufactured by W. & L.E. Gurley, Troy, New York.

Object ID: USGS-000328


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URL: http://www.usgs.gov/aboutusgs/who_we_are/museum/collections/000328_expedition_alidade.asp
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Page Last Modified: Thursday, October 01, 2009