Directing by Terms (according to Alchabitius)

多乙光

摘录自《Introduction to Astrology》, Alchabitius

关于Directing by Terms这种推运法。

Pertaining to this is the garbuhtar used in the nativities.It is the tasyir of the degree of the ascendant.This is what you see in which planet's term the ascendant is.You subtract the rising-times of the ascendant in oblique ascension from the rising-times of the end of the term of this planet. Whatever remains, you take for every degree one year, for every 5 minutes one month, and for every minute 6 days. The lord of the term rules these years and it is the qasim. Then you take the degrees of the term which follows this term and you transfer these also into degrees of rising-times.
Whatever results, you take for every one degree for one year, for every 5 minutes one month, and for every minute for 6 days. The lord of the term is the qasim and the ruler for these years. And you do the same with the lord of each term in succession until the end of the life span.If there is a planet or its ray in the term of a planet, it is participating with it in the qisma. This qisma is called the qisma of the garbuhtar.


.

多乙光

其实有免费的软件
可以计算各种primary directions
包括Placidian , Regiomontanus，（zodiacal or mundane）
验证过也都是正确的。

另janus 4.3的弧角计算也是正确可用的