Wooden horary quadrant, Persian, 18th century.

IRAN - JUNE 12: This unsigned Islamic horary quadrant was made in Persia (part of modern day Iran). Made of wood, it has hand-drawn painted scales and inscriptions and was 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 plumb bob of the instrument. Horary is an archaic term meaning 'of or relating to hours'. The horary quadrant was derived from the astrolabe and first appeared during Medieval times. Like its predecessor, it includes a two-dimensional depiction of a celestial sphere that is reduced to a quarter. (Photo by SSPL/Getty Images)
IRAN - JUNE 12: This unsigned Islamic horary quadrant was made in Persia (part of modern day Iran). Made of wood, it has hand-drawn painted scales and inscriptions and was 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 plumb bob of the instrument. Horary is an archaic term meaning 'of or relating to hours'. The horary quadrant was derived from the astrolabe and first appeared during Medieval times. Like its predecessor, it includes a two-dimensional depiction of a celestial sphere that is reduced to a quarter. (Photo by SSPL/Getty Images)
Wooden horary quadrant, Persian, 18th century.
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Upphovsman:
Science & Society Picture Library / Contributor
Redaktionell fil nr:
90768548
Samling:
SSPL
Datum skapat:
12 juni 2001
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Licenstyp:
Rättighetsskyddat
Releaseinformation:
Saknar release. Mer information
Källa:
SSPL
Objektnamn:
10326180
Högsta tillåtna filstorlek:
3504 x 2577 bpkt (29,67 x 21,82 cm) - 300 dpi - 3 MB