Heliostat

Heliostat

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Description
A heliostat throws sunlight where it might be used for photography or scientific observations. This example (half of a two mirror instrument) has a silvered-glass octagonal mirror, clockwork mechanism, and tripod base with leveling screws. The “J. A. Brashear, Allegheny, Pa.” inscription refers to John A. Brashear who began making telescopes in 1880, in a shop behind his house in Pittsburgh, and who established a new shop in Allegheny, then a suburb of Pittsburgh, in the fall of 1886.
Ref: John A. Brashear, Catalogue (Allegheny, 1906), p. 35.
Location
Currently not on view
Object Name
heliostat
date made
around 1900
maker
Brashear, John A.
place made
United States: Pennsylvania, Pittsburgh
Measurements
overall: 20 in; 50.8 cm
overall: 18 1/2 in x 12 3/8 in x 12 1/2 in; 46.99 cm x 31.4325 cm x 31.75 cm
ID Number
PH.315729
catalog number
315729
accession number
217544
Credit Line
U.S. Military Academy
subject
Science & Scientific Instruments
See more items in
Medicine and Science: Physical Sciences
Data Source
National Museum of American History
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