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Wooden horary quadrant, Arabian, 1730-31

Wooden horary quadrant, Arabian, 1730-31
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Not available to clients invoiced in the UK
Largest available format 3504 × 2746 px 1 MB
Dimension [pixels] Dimension in 300dpi [mm] File size [MB] Online Purchase
Large 3504 × 2746 px 297 × 232 mm 1.2 MB
Medium 1024 × 803 px 87 × 68 mm 734 KB

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IMAGE number
UIS5090708
Image title
Wooden horary quadrant, Arabian, 1730-31
Auto-translated text View Original Source
Artist
Unknown
Location
Science Museum, London, UK
Medium
object
Image description

Wooden horary quadrant, Arabian, 1730-31. 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. ©SSPL/Science Museum

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SSPL/UIG / Bridgeman Images
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