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Catalog Data

Maker:
D. B. Sheahan  Search this
Physical Description:
brass (overall material)
Measurements:
overall: .05 cm x 12.8 cm x 14.8 cm; 1/32 in x 5 1/32 in x 5 13/16 in
Object Name:
sundial or template for a quadrant
sundial or template
Place made:
United States: New York
Date made:
ca 1900
Description:
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.
Reference:
Reference:
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).
Location:
Currently not on view
Subject:
Mathematics  Search this
Timekeeping  Search this
ID Number:
MA.316926
Catalog number:
316926
Accession number:
228694
See more items in:
Medicine and Science: Mathematics
Science & Mathematics
Data Source:
National Museum of American History
GUID:
http://n2t.net/ark:/65665/ng49ca746aa-4186-704b-e053-15f76fa0b4fa
EDAN-URL:
edanmdm:nmah_997151