Sundial or Template for a Quadrant

Sundial or Template for a Quadrant

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This horary quadrant is made of a brass sheet and may in fact be a template rather than a functioning instrument. There is a pinhole at the vertex but no plumb-bob and string. The front bears an hour arc marked from 7 to 11 and several concentric arcs numbered from 30 to 39. A mark scratched by hand near the center of the quadrant reads: 30-39. A mark stamped near the right edge reads: D.B.SHEAHAN. A round hole, 3 cm. in diameter, is near this. The left side extends beyond the circumference of the quadrant in an arm that is 2 cm wide. The reverse of the quadrant bears another hour arc marked from 7 to 11 and several concentric arcs numbered from 40 to 45. A mark scratched by hand near the center of this side of the instrument reads: 40-45.
D. B. Sheahan was a forger who lived around 1900. He may have been a sculptor who resided in New York City. Sotheby sold this instrument on behalf of the scientific instrument collection owned by Henry Russell Wray. Wray was a newspaper editor and manager who purchased the Colorado Springs Gazette in 1896 with Cornelius Vanderbilt Barton and William McKay Barbour.
Sotheby & Company, Catalogue of a Collection of Scientific Instruments, the Property of the Late Henry Russel Wray, London, 1959 (a copy of the catalogue is in the accession file).
Currently not on view
Object Name
sundial or template for a quadrant
sundial or template
date made
ca 1900
D. B. Sheahan
place made
United States: New York
Physical Description
brass (overall material)
overall:.05 cm x 12.8 cm x 14.8 cm; 1/32 in x 5 1/32 in x 5 13/16 in
ID Number
catalog number
accession number
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Data Source
National Museum of American History
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