subject of that part of logic which is conversant about reasonings and modes.
The first set of works in this class, contains, the Art of Reasoning and of Modes, in five books, addressed to Dioscorides; a treatise on Reasoning, in three books; one on the Structure of Modes, addressed to Stesagoras, in five books; a comparison of the Elements of Modes; a treatise on Reciprocal and Conjunctive Reasonings; an essay to Agathon, called also an essay on Problems, which follow one another; a treatise, proving that Syllogistic Propositions suppose one or more other terms; one on Conclusions, addressed to Aristagoras; one essay, proving that the same reasoning can affect several figures; one against those who deny that the same reasoning can be expressed by syllogism, and without syllogism, in two books; three treatises against those who attack the resolution of Syllogisms; one on the treatise on Modes, by Philo, addressed to Timostratus; two treatises on Logic, in one volume, addressed to Timocrates and Philomathes; one volume