Gunter Quadrant
date: label: date made
content: 1600-1700
notes: label: Description
content: This seventeenth century boxwood Gunter-type quadrant has two brass sights along the side of one radius. There is a hole drilled in the side of the quadrant between the sights. The plumb-bob and string which belong at the vertex are missing. The quadrant contains a geometric square marked from 10 to 50 to 10 in units of 2 degrees, an hour arc from 1 to 6 to 12 and an azimuth arc from 20 to 90 to 120, an ecliptic arc calibrated by zodiac symbol, a declination scale to 24 degrees, a horizon arc marked from 10 to 30, a second hour arc marked from 4 to 12 and arc marked from 10 to 50 by 10 degrees, a calendar arch named by month, and a circumference marked from 0 to 90 in units of one-half degree. There are two small "beetles" on either side of the calendar arc which may possibly be a maker's mark. This dial was made for a latitude of approximately 52 degrees.
label: Description
content: Reference:
label: Description
content: Abraham Rees, "Quadrant," <i>Cyclopaedia</i> (London, 1819), vol. 29.
label: Description
content: The Whipple Museum of the History of Science, <i>Catalogue 6</i>: "Sundials and Related Instruments," Part 4, Section 3, "Horary Quadrants."
label: Location
content: Currently not on view
place: label: place made
content: United Kingdom: Grand Bretagne
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
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content: Time and Navigation
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content: Navigation
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content: Trigonometry
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content: Measuring & Mapping
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.319017
label: catalog number
content: 319017
label: accession number
content: 236091
objectType: label: Object Name
content: quadrant
physicalDescription: label: Physical Description
content: boxwood (overall material)
label: Physical Description
content: brass (sights material)
label: Measurements
content: overall: 1 cm x 12.7 cm x 13.1 cm; 13/32 in x 5 in x 5 5/32 in