Sahl ibn Bishr
Definition
Sahl ibn Bishr was an early medieval astrologer represented through the collected Works of Sahl and Masha'allah and source material on questions and elections.
Life and context
His writings belong to the Arabic astrological tradition that later circulated in Latin translation and informed medieval western practice.
Work and ideas
The reviewed material includes electional organization, question scope, reception and perfection, interference conditions, and planetary-condition context.
Scope and limitations
The source reference is collection-level. Astrotechne keeps Sahl-specific passages separate from Masha'allah material and later adaptations.
Source texts
Documented rules
3 documented rules
A slower collector receives two applying lights and gathers them into one perfected relation under the medieval collection doctrine.
A third party perfects first and blocks the intended matter, preserving Sahl's broader prohibition family and its cutting-off subtype.
A faster intermediary body separates from one significator and applies to another, carrying the light onward in the medieval transfer-of-light doctrine.