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Catalog Data

Physical Description:
brass (overall material)
Measurements:
overall: 2.3 cm x 12 cm x 11 cm; 29/32 in x 4 23/32 in x 4 11/32 in
Object Name:
reflecting horizon
Description:
Navigators using a sextant might use an artificial horizon when the natural horizon is not easily seen. Artificial horizons employing a flat piece of black glass came into use in England in the early nineteenth century. This example is unsigned.
Ref: William Pearson, An Introduction to Practical Astronomy (London, 1829), p. 295 and pl. XXIX.
Location:
Currently not on view
ID Number:
ZZ.RSN79601Z19
See more items in:
Medicine and Science: Physical Sciences
Data Source:
National Museum of American History
GUID:
http://n2t.net/ark:/65665/ng49ca746b3-f2cb-704b-e053-15f76fa0b4fa
EDAN-URL:
edanmdm:nmah_1865127