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Gunter Quadrant

Catalogue number:
MA*330843

Inscriptions:
"TD" (three times), "1790," and "17"

Dimensions:
5 x 5 inches

Discussion:
This Gunter quadrant has a brass sight on the top of the quadrant along one radius. There is no pinhole in this sight; it is completely solid. 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 1 degree, an hour arc (U-shaped) from I to VI to XI to XII and an azimuth arc from 30 to 90 to 120 by 10 degrees, 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 VIII to I, a calendar arch lettered by month, and a circumference marked from 0 to 90 in units of one-half degree. There are suns between most Roman numerals on the hour arcs, moons on each side of the calendar arc, and sets of 3 dots at each 5-degree mark on the circumference. 5 stars are charted: VH, BE, LH, A, PW. This dial was made for a latitude of approximately 52 degrees.

Further Information:

Gunter Quadrant