Sets forth the art of astrology as an abstract logic wherein delineation is at least partly reduced to a calculus of manipulating and combining letters. A good example of Lull's universal and systematic approach to all of knowledge. Strong emphasis on the Aristotelean elements, offering surprisingly elegant derivations of planetary combinations, and planet/sign combinations. Explanation of astrological workings in terms of Aristotelean formal causality. This translation has already generated considerable excitement in the astrological community because it to some extent anticipates some of Gauquelin's findings; it has renewed contemporary investigation into the nature and order of the elemental triplicities. This volume contains Book I of Lull'sTreatise.