Astrolabe Catalogue

 

Front of astrolabe without rete or plates. Click to enlarge
Date ca. 1570
Maker Allāh-Dād
Place Lahore
Material Brass
Inventory no. 47376
Acquisition Presented by J. A. Billmeir in 1957

Throne

The throne is of the indo-persian, pierced type . The throne is attached with a integrated base. This throne is notably braoder than most pierced thrones..

Ring

The ring is of the simple, squared cross-section type (i.e. a simple ring made from a round rod or piece of metal). As with all of this instrument, the ring is thick and heavy.

Shackle

Shackle of the trefoil type. The heavy shackle was formed into trefoil shape..

Mater

The mater and limb are of one-piece construction. The tab to hold the tympans in place is located at the bottom of the instrument, 180° from the throne.. Scales on the limb:
Type Range & Units Numbered Geometry Location
Degree 0 - 360 Degrees of arc Every 5 degrees Circular, concentric None

Womb


Contains a gazeteer..
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