Guido Bonatti, On the Arabic Parts
Definition
On the Arabic Parts is an astrological source represented here through cited material on lots, albumasar, marriage, seventh angle, and significators.
What this work covers
The cited material covers lots, albumasar, marriage, seventh angle, and significators.
Chapter 16 adds ten parts attributed to Albumasar's fifth differentia for natal, universal-question, and revolution work. This supplementary authority remains a separate transmitted source layer rather than being merged with Bonatti's preceding house sequence.
Chapter 17 groups extraordinary parts outside the twelve-house sequence and states that judgment combines the part's lord, its place, source significators, natural significators, and aspects, with the lord of the containing sign preferred.
Bonatti transmits a Hermes marriage lot for men and women that takes Venus to the degree and minute of the wedding angle, explicitly identifying that wedding angle as the seventh angle, then projects the distance from the Ascendant.
Scope and limitations
This overview is limited to the cited portions. It does not stand in for the complete work, reproduce source passages, or make every documented technique a universal chart interpretation.