The second set contains, one book of Conclusive Reasonings, addressed to Zeno; one on Primary Syllogisms, which are not demonstrative; one on the resolution of Syllogisms; one, in two books, on Captious Reasonings, addressed to Pasylus; one book of Considerations on Syllogisms; one book of Introductory Syllogisms, addressed to Zeno; three of Introductory Modes, addressed also to Zeno; five of False Figures of Syllogism; one of a Syllogistic Method, for the resolution of arguments, which are not demonstrative; one of Researches into the Modes, addressed to Zeno and Philomathes (but this appears to be an erroneous title).
The third set contains, one essay on Incidental Reasonings, addressed to Athenades (this again is an incorrect title); three books of Incidental Discourses on the Medium (another incorrect title); one essay on the Disjunctive Reasons of Aminias.
The fourth set contains, a treatise on Hypothesis, in three books, addressed to Meleager; a book of hypothetical reasonings on the Laws, addressed also to Meleager; two books of hypothetical reasoning to serve as an Introduction; two books of hypothetical reasonings on Theorems; a treatise in two books, being a resolution of the Hypothetical Reasonings of Hedylus; an essay, in three books, being a resolution of the Hypothetical Reasonings of Alexander (this is an incorrect title); two books of Expositions, addressed to Leodamas.
The fifth set contains, an introduction to Fallacy, addressed to Aristocreon; an introduction to False Reasonings; a treatise in six books, on Fallacy, addressed to Aristocreon.
The sixth set contains, a treatise against those who believe Truth and Falsehood to be the same thing. One, in two books, against those who have recourse to division to resolve the Fallacy, addressed to Aristocreon; a demonstrative essay, to prove that it is not proper to divide indefinite terms; an essay, in three books, in answer to the objections against the non-division of Indefinite Terms, addressed to Pasylus; a solution, according to the principles of the ancients, addressed to Dioscorides; an essay on the Resolution of the Fallacy, addressed to Aristocreon, this is in three books; a resolution of the Hypothetical Arguments of Hedylus, in one book, addressed to Aristocreon and Apollos.
The seventh set contains, a treatise against those who contend that the premisses on the Fallacy, are false; a treatise on Negative Reasoning, addressed to Aristocreon, in two books; one book of Negative Reasonings, addressed to Gymnasias; two books of a treatise on Reasoning by Progression, addressed to Stesagoras; two books of Reasonings by Interrogation, and on the Arrest,[105] addressed to Onetor; an essay, in two books, on the Corrected Argument, addressed to Aristobulus; another on the Non-apparent Argument, addressed to Athenades.
The eighth set contains, an essay on the Argument Outis, in eight books, addressed to Menecrates; a treatise, in two books, on Arguments composed of a finite term, and an indefinite term, addressed to Pasylus; another essay on the Argument Outis, addressed to Epicrates.
The ninth set contains, two volumes of Sophisms, addressed to Heraclides, and Pollis; five volumes of Dialectic Arguments, which admit of no solution, addressed to Dioscorides; an essay, in one book, against the Method of Arcesilaus, addressed to Sphærus.
The tenth set contains, a treatise in six books, against Custom, addressed to Metrodorus; and another, in seven books, on Custom, addressed to Gorgippides.
There are, therefore, works on Logic, in the four grand classes which we have here enumerated, embracing various questions, without any connection with one another, to the number of thirty nine sets, amounting in the whole to three hundred and eleven treatises on Logic.