Wooden horary quadrant, Arabian, 1730-31.

ARABIA - JUNE 12: This Islamic horary quadrant was made by Mustafa Ayyubi in the Middle East. Made of wood, the quadrant has hand drawn painted scales and inscriptions. Horary is an archaic term meaning 'of or relating to hours'. The horary quadrant 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 tread of the plumb bob of the instrument. 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)
ARABIA - JUNE 12: This Islamic horary quadrant was made by Mustafa Ayyubi in the Middle East. Made of wood, the quadrant has hand drawn painted scales and inscriptions. Horary is an archaic term meaning 'of or relating to hours'. The horary quadrant 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 tread of the plumb bob of the instrument. 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, Arabian, 1730-31.
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Contactez votre agence locale pour toute utilisation commerciale ou promotionnelle.
Crédits :
Science & Society Picture Library / Contributeur
Editorial - n° :
90768544
Collection :
SSPL
Date de création :
12 juin 2001
Date de chargement :
Type de licence :
Droits gérés
Infos autorisations :
Autorisation non disponible. Plus d'infos
Source :
SSPL
Référence :
10326182
Taille max. de fichier :
3504 x 2746 px (29,67 x 23,25 cm) - 300 dpi - 2 MB