addressed to Clitus; one on the treatise of Philo, on Signification; one on what it is that Falsehood consists in.
The third set contains, two treatises on Imperative Propositions; two on Interrogation; four on Examination; an epitome of the subject of Interrogation and Examination; four treatises on Answer; an abridgment on Answer; two essays on Investigation.
The fourth set contains ten books on Categorems, addressed to Metrodorus; one treatise on what is Direct and Indirect, addressed to Philarchus; one on Conjunctions, addressed to Apollonides; four on Categorems, addressed to Pasylus.
The fifth set contains, one treatise on the Five Cases; one on Things defined according to the Subject; two on Enunciation, addressed to Stesagoras; two on Appellative Nouns.
The next class of his writings refers to rules of Logic, with reference to words, and speech which consists of words.
The first set of these contains, six treatises on Singular and Plural Enunciations; five on Words, addressed to Sosigenes and Alexander; four on the Inequality of Words,