Wheatstone-type Sundial by Darker

Wheatstone-type Sundial by Darker

Usage conditions apply
This instrument consists of a brass cone with appropriate lenses, a metal bar which can be raised or lowered to rotate the cone vertically, a brass supporting rod and a wooden stand with screws on the four corners.
Charles Wheatstone, "On a means of determining the apparent Solar Time by the diurnal Changes of the Plane of Polarization at the North Pole of the Sky," Report of the British Association for the Advancement of Science, 1848, pp. 10-12 (Works, London: Taylor & Francis, 1879, 285-289).
Currently not on view
Object Name
date made
about 1850
ca 1850
place made
United Kingdom: England, London, Lambeth
Physical Description
wood (overall material)
brass (overall material)
glass (overall material)
overall: 66.8 cm x 24.8 cm x 21.2 cm; 26 5/16 in x 9 3/4 in x 8 3/8 in
ID Number
catalog number
accession number
Credit Line
Gift of the University of Alabama, Department of Physics
See more items in
Medicine and Science: Mathematics
Data Source
National Museum of American History
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