Astrolabes /
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Date | 1224/5 (A.H. 621) |
Maker | Muḥammad ibn Fattūḥ al-Khamā’irī |
Place | Seville |
Material | Brass |
Inventory no. | 50934 |
Acquisition | Presented by Lewis Evans in 1924 |
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detailed provenance for this astrolabe
Mater
The mater and limb are of one-piece construction. Scales on the limb: degree scale. More informationBack
The back contains 7 scales of the following types: Altitude; Zodiacal signs; Calendar; Perpetual calendar; Shadow square; Cotangent. More informationRete, Nut & Bolt
The rete contains 0 stars. The zodiac on the rete is labelled: الحمل , الثور , الجوزا , السرطان , الاسد , السنبلة , الميزان , العقرب , القوس , الجدي , الدلو , الحوت .The rete is attached using a nut & bolt. A small, square nut thread on to an equally small bolt. The head of the bolt has a small pointer extending from it. The shank of the bolt is square and fit into the square hole on the alidade. This ensured that the pointer on the front of the instrument was always colinear with the alidade on the back.. More information
Rules & Alidades
Type | Details |
---|---|
Alidade | Double-ended, counter-changed. The sights that were
originally on this alidade have since broken off and are
now missing.. |