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Brass horary quadrant, 1549.

UNITED KINGDOM - APRIL 11: This electrotype copy of rectangular horary quadrant was made by Georg Hartmann (1489-1564) in Nuremberg, Germany. Horary quadrants were used for finding local time by sighting either the Sun or a bright star at night. Held vertically, a measurement could be taken from the position on the scale of a moveable bead on the thread of the instrument�s plumb bob. The instrument was derived from the astrolabe and first appeared during Medieval times. Like its predecessor, it includes a two-dimensional depiction of the heavens that is reduced to a quarter. This reverse view shows extra timekeeping scales. (Photo by SSPL/Getty Images)
UNITED KINGDOM - APRIL 11: This electrotype copy of rectangular horary quadrant was made by Georg Hartmann (1489-1564) in Nuremberg, Germany. Horary quadrants were used for finding local time by sighting either the Sun or a bright star at night. Held vertically, a measurement could be taken from the position on the scale of a moveable bead on the thread of the instrument�s plumb bob. The instrument was derived from the astrolabe and first appeared during Medieval times. Like its predecessor, it includes a two-dimensional depiction of the heavens that is reduced to a quarter. This reverse view shows extra timekeeping scales. (Photo by SSPL/Getty Images)
Brass horary quadrant, 1549.
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Credit:
Science & Society Picture Library / Contributor
Editorial #:
90731636
Collection:
SSPL
Date created:
April 11, 1995
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License type:
Rights-managed
Release info:
Not released.ÌýMore information
Source:
SSPL
Object name:
10196493
Max file size:
2787 x 3504 px (9.29 x 11.68 in) - 300 dpi - 3 MB