Abstract

This book is one of the series entitled "Rare Masterpieces of Philosophy and Science" and it is entitled to both distinctions. The papers collected here are virtually unobtainable except in the most complete libraries; and de Morgan's work is clearly that of a master-between Boole and Frege, he is the leading figure in formal logic. The papers found herein include the series of six on the syllogism published between 1846 and 1868, together with three shorter notes concerning logical phraseology, a syllabus for a system of logic, and an encyclopaedia article whose topic is logic. The editor has added a useful introduction which, among other important services, allows us to see de Morgan, not, as we today see him, as a founder of symbolic logic, but as a rival of William Hamilton, engaged in controversy much of his life.—P. J. M.