Astrolabe Catalogue

 

Front of astrolabe without rete or plates. Click to enlarge
Date late 18th century
Place North Africa
Material Brass
Inventory no. 40407
Acquisition Presented by J. A. Billmeir in 1957

Throne

The throne is of the simple type . The throne is attached with a integrated base. The throne is made in two pieces: the back is an extension of the back plate while the front is integrated into the limb.

Ring

The ring is of the simple, round cross-section type (i.e. simple plain ring made from a round rod or piece of metal). This is a rather crude ring

Shackle

Shackle of the eye-bolt type (i.e. any shackle that attactes to the ring via an eye-bolt type feature). A simple eye-bolt attaches to an angle bracket.

Mater

The mater and limb are of two pieces, riveted construction. The notch that accepts the tab is located at the throne. Scales on the limb:
Type Range & Units Numbered Geometry Location
Degree 0 - 360 Degrees Every 5 degrees Circular, concentric outer

Womb


The womb has been engraved as if the maker intended to add a gazetteer. However, the gazetteer was never completed.
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