intellectual stimulus and guidance such as he can never forget. When a father, such as we have described, declining to send his son either to school or college, constituted himself schoolmaster from the beginning, and performed that duty with laborious solicitude--when, besides full infusion of modern knowledge, the forcing process applied by the Platonic Socrates to the youth-Theætêtus, was administered by Mr James Mill, continuously and from an earlier age, to a youthful mind not less pregnant than that of Theætêtus--it would be surprising if the son thus trained had not reached even a higher eminence than his father. The fruit borne by Mr John Stuart Mill has been worthy of the culture bestowed, and the volume before us is at once his latest and his ripest product. The 'Examination of Sir William Hamilton's Philosophy' is intended by Mr Mill (so he tells us in the preface to the sixth published edition of his 'System of Logic, Ratiocinative and Inductive') as a sequel and complement to that system. We are happy to welcome so valuable an addition; but with or without that addition, the 'System of Logic' appears to us to present the most important advance in speculative theory which the present century has witnessed. Either half of it, the Ratiocinative or the Inductive, would have surpassed any previous work on the same subject. The Inductive half discriminates and brings into clear view, for the first time, those virtues of method which have insensibly grown into habits among consummate scientific inquirers of the post-Baconian age, as well as the fallacies by which some of these authors have been misled. The Ratiocinative half, dealing with matters which had already been well handled by Dutrieu and other scholastic logicians, invests their dead though precise formalism with a real life and application to the actual process of finding and proving truth. But besides thus working each half up to perfection, Mr Mill has performed the still more difficult task of overcoming the repugnance, apparently an inveterate repugnance, between them, so as chemically to combine the two into one homogeneous compound; thus presenting the problem of Reasoned Truth, Inference, Proof, and Disproof, as one connected whole. For ourselves, we still recollect the mist which was cleared from our minds when we first read the 'System of Logic,' very soon after it was published. We were familiar with the Syllogistic Logic in Burgersdicius and Dutrieu; we were also familiar with examples of the best procedure in modern inductive science; but the two streams flowed altogether apart in our minds, like two parallel lines never joining nor approaching. The irreconcilability of the two was at once removed, when we had read and mastered the second and third chapters of the Second Book of the 'System of Logic;' in which Mr Mill explains the functions and value of the Syllogism, and the real import of its major premiss. This explanation