Aristotle's Theory of the Syllogism

The present book is the English version of a monograph ''Die aristotelische Syllogistik'', which first appeared ten years ago in the series of Abhand­ 1 lungen edited by the Academy of Sciences in Gottingen. In the preface to the English edition, I would first like to express my indebtedness to Mr. J. Barnes, now fellow of Oriel College, Oxford. He not only translated what must have been a difficu...