Astrolabes /
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Date | 1282/3 |
Maker | Ḥasan ibn ‘Alī |
Place | Cairo |
Material | Brass |
Inventory no. | 49861 |
Acquisition | Presented by Lewis Evans in 1924 |
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Back
This side of the plate was silvered, most of which is now rubbing off. In addition to the scales on this plate, there are two tables: 'Know the degree of the sun' and a table of Coptic Months.. The back contains 4 scales of the following types: Altitude; Sine/Cosine; Cotangent. The back is inscribed: with a marked as [inscriptions above left-hand table and in sine graphs]. [ pending ]. More information