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Inventory no. 46886 - Former Display Label

32
Persian ASTROLABE
c.1660

Signed, 'Decorated by Muhammad Mahdî al-Yazdî, son of Muhammad Amîn'; undated. Brass, with inlaid silver decoration on one side of one plate (shown).

{ain}Ankabût for c. forty-six stars. Six plates for latitudes 22°, 32°; 26°, 34°; 30°, 35°; 36°, 38°; 37°; 40°; including a tablet of horizons and a tablet of ecliptical co-ordinates. In the umm is engraved a table giving the jiha, longitude, latitude, and inhirâf of forty-six towns. At the bottom of the back, on the front of the bracket and around the edge are ornamental inscriptions.

On the back are engraved a sine graph, cotangent scales, the arcs of the signs of the zodiac, a graph showing the altitude of the sun at mid-day throughout the year in latitudes 26°, 29°, 32°, 35°, 38°, 41°, 44° and 47°, a graph of the azimuths of the Qibla for Kûfa, Baghdad, Isfahân, Yazd, and oûs, various astrological tables including a table correlating the signs of the zodiac, the planets, their limits and faces, and the mansions of the moon, together with the usual shadow-square (within which is a table of triplicities) and a scale of degrees. At the bottom of the back, on the front of the bracket and around the edge are ornamental inscriptions. In the back of the bracket is set a small compass, the needle of which is shaped like a flying bird. On the alidade are engraved scales of declination and hours.

Formerly in the Chadenat Collection.

[57-84/162; Mayer, Muhammad Mahdî IX]
Billmeir Collection

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