Sunwatch Portable Horizontal Sundial
date: label: date made
content: 1922 -1929
notes: label: Description
content: This horizontal sundial is similar to the "Butterfield" style. It consists of a rectangular brass case with a latch which holds a sundial and compass. The dial has a brass gnomon arm which pulls up from a slit in the dial. The dial is calibrated along the rectangular edge from 5 to 12 to 7 (by quarter-hours) for a latitude of 35 degrees, around an octagon from 5 to 12 to 7 (by quarter-hours) for a latitude of 40 degrees, and around a circle from 5 to 12 to 7 (by quarter-hours) for a latitude of 45 degrees. The compass has a glass face and a metal needle. The compass rose has sixteen points. There is also a scale divided by five degrees along the top edge of the compass. This scale runs from 40 to 0 to 40. The top half of the case is lined with leather. In the case there is supposed to be a time correction chart for forty cities in the United States.
label: Description
content: A mark toward the bottom of the base reads: MF'D. BY THE ANSONIA CLOCK CO, N.Y. U.S.A. (/) PATENT SUNWATCH PENDING.
label: Description
content: This dial is a "Sunwatch" patented by George Hollinwood on June 6, 1922. The Ansonia Clock Company, a maker of fine and novelty clocks, sold the Sunwatch to outdoorsmen until the company went out of business in 1929.
label: Location
content: Currently not on view
place: label: place made
content: United States: New York, Brooklyn
topic: label: Subject
content: Mathematics
label: Subject
content: Timekeeping
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of George Watson
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1987.0787.05
label: catalog number
content: 1987.0787.05
label: accession number
content: 1987.0787
objectType: label: Object Name
content: sundial
physicalDescription: label: Measurements
content: overall: .9 cm x 5.1 cm x 8.1 cm; 11/32 in x 2 in x 3 3/16 in