Reflection horizon
Title
Reflection horizon
Subject
Astronomy
Navigation
Surveying
Measuring instruments
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.
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
Date
about 1915
Contributor
Michael Svec
Rights
copyright Michael Svec
Format
image/jpg
Language
English
Type
physical object
Identifier
University of Illinois Observatory Collection A226.1, 226.2
University ID 016680 obs142, 016682 obs144
University ID 016680 obs142, 016682 obs144
Coverage
University of Illinois Observatory, Urbana, Illinois
Files
Collection
Citation
Keuffel & Esser Company, New York, “Reflection horizon,” University of Illinois Observatory Collection, accessed June 13, 2025, https://uiobservatory.omeka.net/items/show/17.