Astrolabe Catalogue

 

Image of the tympan or plate - click for larger version
Tympan 4a
Latitude 27°0'
.

Almucantars

Divisions Labelled Style
Divided every 1° from 0° to 90° Labelled every 2° with   (Abdjad) numerals Plain line.

Azimuths

Divisions Labelled Style
Divided every 30°  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) (Abdjad), Hatched line style.

Inscriptions

Transcription Translation Type
بعرص كز For latitude 27° Latitude
ساعسته يج مه Hours 13h 45m Hours of daylight
مشرق East Direction
مغرب West Direction
MHS Home | Contact Us | ©2006 Museum of the History of Science