Peter Heath. Introduction. On the syllogism and other logical writings by Augustus De Morgan, edited, with an introduction by Peter Heath, Yale University Press, New Haven 1966, pp. vii–xxxi. - Peter Heath. Select bibliography. On the syllogism and other logical writings by Augustus De Morgan, edited, with an introduction by Peter Heath, Yale University Press, New Haven 1966, p. xxxi. - Augustus de Morgan. On the syllogism: I. On the structure of the syllogism. A reprint of 202 with omission of the portion (or separate paper) entitled and on the application of the theory of probabilities to questions of argument and authority. On the syllogism and other logical writings by Augustus De Morgan, edited, with an introduction by Peter Heath, Yale University Press, New Haven 1966, pp. 1–21. - Augustus de Morgan. On the syllogism: II. On the symbols of logic, the theory of the syllogism, and in particular of the copula. A reprint of 205 with omission of the portion (or separate paper) entitled and the application of the theory of probabilities to some questions of evidence. On the syllogism and other logical writings by Augustus De Morgan, edited, with an introduction by Peter Heath, Yale University Press, New Haven 1966, pp. 22–68. - Augustus de Morgan. Some suggestions in logical phraseology. On the syllogism and other logical writings by Augustus De Morgan, edited, with an introduction by Peter Heath, Yale University Press, New Haven 1966, pp. 69–73. (Reprinted from Proceedings of the Philological Society, 11 February 1853.) - Augustus de Morgan. On the syllogism: III. And on logic in general. Areprint of 205. On the syllogism and other logical writings by Augustus De Morgan, edited, with an introduction by Peter Heath, Yale University Press, New Haven 1966, pp. 74–146. - Augustus de Morgan. Syllabus of a proposed system of logic. A reprint of 204 with omission of paragraphs 227–243. On the syllogism and other logical writings by Augustus De Morgan, edited, with an introduction by Peter Heath, Yale University Press, New Haven 1966, pp. 147–207. - Augustus de Morgan. On the syllogism: IV. And on the logic of relations. A reprint of 20d and 207. On the syllogism and other logical writings by Augustus De Morgan, edited, with an introduction by Peter Heath, Yale University Press, New Haven 1966, pp. 208–246. - Augustus de Morgan. Logic. A reprint of XX 307(3) 'shortened and adapted to its present context, chiefly by the omission of obsolete bibliographical material.' On the syllogism and other logical writings by Augustus De Morgan, edited, with an introduction by Peter Heath, Yale University Press, New Haven 1966, pp. 247–270. - Augustus de Morgan. On the syllogism: V. And on various points of the onymatic system. A reprint of 208. On the syllogism and other logical writings by Augustus De Morgan, edited, with an introduction by Peter Heath, Yale University Press, New Haven 1966, pp. 271–345. - Augustus de Morgan. On the syllogism: VI. On quantity and location; on identity in relation to the syllogism; on the history of the mnemonic words, of the fourth figure, of logic at Cambridge, of the occult quality; on the triadic system of enunciation. On the syllogism and other logical writings by Augustus De Morgan, edited, with an introduction by Peter Heath, Yale University Press, New Haven 1966, pp. 346–347