ASTROLABE BY MAHMUD BIN SHAUKAT AL-BAGHDADI
It is a medium sized neatly produced astrolabe made of brass with a
diameter of 190.5 mm and a thickness of 7 mm. The body, the kursi
and the limb are cast as one piece. It is solid and plain. It
contains six tympans. The diameter of the rete and tympans is 165.5
mm. All the six tympans contain, on both sides, stereographic
projection to specific terrestrial latitudes. On the inner side of
the mater there is a further projection. Thus, these tympans serve
altogether 13 different latitudes.
On the back, on the topmost part of
the kursi, there is an inscription stating that the astrolabe
was made by Mahmud bin Shaukat al-Baghdadi in the year 706 AH / 1306
AD, for the repository of al-Sultan al-Adil. The identity of
this ruler is not definitely established.