Astrolabe Catalogue

 

Image of the tympan or plate - click for larger version
Tympan 4b
Latitude 37°0'
The bulk of the engraving on this tympan is in a different hand, note especially the ال (al-) in the latitude and direction inscriptions..

Almucantars

Divisions Labelled Style
Divided every 3° from 0° to 90° Labelled every 3° with   (Abdjad) numerals Plain line.

Azimuths

Divisions Labelled Style
Divided every 10°  Labelled every 10° with   (Abdjad) numerals Plain line.

Circles

Type Labelled Style Notes
Equator Plain line.
Tropic of Cancer Plain line.
Tropic of Capricorn Plain line.

Lines

Type Labelled Description
Meridian line
Horizon rectus
Unequal hours Numbered (Numbers in Numbers, engraved script) (Abdjad), Plain line style.
Equal hours from sunset Numbered (Numbers in Numbers, engraved script) (Modern), Plain line style.

Inscriptions

Transcription Translation Type
العرض لز Latitude 37° Latitude
الساعست يد لد Hours 14h34m Hours of daylight
المشرق East Direction
المغرب West Direction
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