Of Inferences, addressed to Aristagoras, one book. How the same Syllogism may be drawn up in several Moods, one book. Reply to the Objections brought against drawing out the same Argument syllogistically and without a Syllogism, two books. Reply to the Objections against the Analyses of Syllogisms, three books. Reply to Philo's Work on Moods, addressed to Timostratus, one book. Collected Logical Writings, addressed to Timocrates and Philomathes : a Criticism of their Works on Moods and Syllogisms, one book. Second series : On Conclusive Arguments, addressed to Zeno, one book. On the Primary Indemonstrable Syllogisms, addressed to Zeno, one book. On the Analysis of Syllogisms, one book. Of Redundant Arguments, addressed to Pasylus, two books. Of the Rules for Syllogisms, one book. Of Introductory or Elementary Syllogisms, addressed to Zeno, one book. Of the Introductory Moods, addressed to Zeno, three books. Of the Syllogisms under False Figures, five books. Syllogistic Arguments by Resolution in Indemonstrable Arguments, one book. Inquiries into the Moods : addressed to Zeno and Philomathes, one book. (This appears to be spurious.)