Subject
Astronomy
Navigation
Surveying
Measuring instruments
Description
Black glass ground plane surface, 3 3/8 diameter, 3 leveling screws, fine graduated adjustable spirit level, and mahogany case.
In the 1913 Keuffel & Esser catalog (page 413) the reflecting horizon cost $16. The reflecting horizon is an alternative to the mercury artificial horizon and is used with a sextant when the horizon is not visible.
Creator
Keuffel & Esser Company, New York
Source
Keuffel & Esser Co. (1913). Catalogue and price list of Keuffel& Esser co, manufacturers and importers of drawing materials and surveying instruments. Keuffel & Esser Co: New York.
Publisher
Astronomy Department, University of Illinois, Urbana, Illinois
Rights
copyright Michael Svec
Identifier
University of Illinois Observatory Collection A226.1, 226.2
University ID 016680 obs142, 016682 obs144
Coverage
University of Illinois Observatory, Urbana, Illinois
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