_Reference._--For a more full and exact account of Hamilton's system, the reader is referred to the article on logic in the volume of _Discussions on Philosophy and Literature_, by Sir W. Hamilton; also, to "_An Essay on the New Analytic of Logical Forms_," by Thomas Spencer Baynes, L. L. B. On the history of logic in general, see _Dictionnaire des Sciences Philosophiques_--Article _Logique_, by Barthèleme St. Hilaire, Professor of Philosophy to the College of France, member of the Institute, etc., etc.; also, Blakey's _History of Logic_. The _Memoir_ of St. Hilaire, on the logic of Aristotle, is one of the best works of modern times on the subject of which it treats. INTELLECTUAL FACULTIES PART FOURTH. INTUITIVE POWER. CHAPTER I. EXISTENCE AND NATURE OF THE INTUITIVE FACULTY. _Office of this Power._--In our analysis of the powers of the mind, one was described as having for its office the conception of truths that lie apart from the region and domain of sense--first principles and primary ideas, fundamental to, and presupposed in, the operations of the understanding, yet not directly furnished by sense. They are awakened in the mind on occasion of sensible experience, but it is not sensible experience which produces them. On the contrary, they spring up in the mind as by intuition, whenever the fitting occasion is presented. We must attribute their origin to a special power of the mind by virtue of which, under appropriate circumstances, it conceives the truths and ideas to which we refer. This power we have termed the _originative_ or _intuitive_ faculty.