Islamic horary quadrant, Persian, 1701-1800

Made:
1701-1800 in Iran
Islamic horary quadrant, Persian, 1701-1800 Islamic horary quadrant, Persian, 1701-1800 Islamic horary quadrant, Persian, 1701-1800

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Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

Buy this image as a print 

Buy

License this image for commercial use at Science and Society Picture Library

License

Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

Buy this image as a print 

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License this image for commercial use at Science and Society Picture Library

License

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Wooden horary quadrant (25-cm radius) with painted scales and leather case, Islamic script, unsigned, Persia, 1701-1800.

This unsigned Islamic horary quadrant was made in Persia (Iran) during the eighteenth century. Made of wood the quadrant has hand drawn painted scales and inscriptions. 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 thread of the plumb bob of the instrument. The horary quadrant was derived from the astrolabe and first appeared during the Medieval Period. Like its predecessor, it includes a two-dimensional depiction of a celestial sphere that is reduced to a quarter.

Details

Category:
Astronomy
Object Number:
1918-261
Materials:
wood and case, leather
Measurements:
overall: 20 x 250 x 250 mm
type:
horary quadrant
credit:
Mrs Philiss D Lee

Parts

Case for Islamic horary quadrant, Persian, 1701-1800

Case for Islamic horary quadrant, Persian, 1701-1800

Leather case for wooden horary quadrant (25-cm radius) with painted scales, Islamic script, unsigned, Persia, 1701-1800.

Measurements:
overall: 12 x 255 x 253 mm
Materials:
leather
Object Number:
1918-261 Pt1
type:
components and pouches
Image ©
The Board of Trustees of the Science Museum