laboratory had already been placed under Professor Münsterberg's charge. For one year, during which Münsterberg returned to Germany, James was compelled to direct its conduct; but he let it be known that he would resign his professorship rather than concern himself with it indefinitely. Readers of this book will have seen that the centre of his interest had always been religious and philosophical. To be sure, the currents by which science was being carried forward during the sixties and seventies had supported him in his distrust of conclusions based largely on introspection and _a priori_ reasoning. As early as 1865 he had said, apropos of Agassiz, "No one sees farther into a generalization than his own knowledge of details extends." In the spirit of that remark he had spent years on brain-physiology, on the theory of the emotions, on the feeling of effort in mental processes, in studying the measurements and exact experiments by means of which the science of the mind was being brought into quickening relation with the physical and biological sciences. But all the while he had been driven on by a curiosity that embraced ulterior problems. In half of the field of his consciousness questions had been stirring which now held his attention completely. Does consciousness really exist? Could a radically empirical conception of the universe be formulated? What is knowledge? What truth? Where is freedom? and where is there room for faith? Metaphysical problems haunted his mind; discussions that ran in strictly psychological channels bored him. He called psychology "a nasty little subject," according to Professor Palmer, and added, "all one cares to know lies outside." He would not consider spending time on a revised edition of his textbook (the "Briefer Course") except for a bribe that was too great ever to be urged upon him. As time went on, he became more and more irritated at being addressed or referred to as a "psychologist." In June, 1903, when he became aware that Harvard was intending to confer an honorary degree on him, he went about for days before Commencement in a half-serious state of dread lest, at the fatal moment, he should hear President Eliot's voice naming him "Psychologist, psychical researcher, willer-to-believe, religious experiencer." He could not say whether the impossible last epithets would be less to his taste than "psychologist." Only along the borderland between normal and pathological mental states, and particularly in the region of "religious experience," did he continue to collect psychological data and to explore them. The new subjects which he offered at Harvard during the nineties are indicative of the directions in which his mind was moving. In the first winter after his return he gave a course on Cosmology, which he had never taught before and which he described in the department announcement as "a study of the fundamental conceptions of natural science with especial reference to the theories of evolution and materialism," and for the first time announced that his graduate "seminar" would be wholly devoted to questions in mental pathology "embracing a review of the principal forms of abnormal or exceptional mental life." In 1895 the second half of his psychological seminar was announced as "a discussion of certain theoretic problems, as Consciousness, Knowledge, Self, the relations of Mind and Body." In 1896 he offered a course on the philosophy of Kant for the first time. In 1898 the announcement of his "elective" on Metaphysics explained that the class would consider "the unity or pluralism of the world ground, and its knowability or unknowability; realism and idealism, freedom, teleology and theism."[2] But there is another aspect...