In his sad condition of mental disarray our author betook himself, he says, to the counsels of Thomas Carlyle. That sage, when he heard that his visitor had been reading Spencer, made some uncomplimentary remarks about the latter which we hardly think the visitor was justified in repeating. Apart from this, Carlyle told him in effect that, as he was in the world, he had just to make the best of it, and that in time he would find work that he could do with benefit to himself and others. Finally, our author made what he calls a discovery and offers as a contribution to modern philosophy--namely, that in the mind of man there is a "scale," according to which thoughts and feelings are appraised. Some are high up on the scale and some are low down. He found that there is that _in_ the mind which is not _of_ the mind, and which sits in judgment on all the contents of the mind--something which smiles on every right action and frowns on every wrong one, and yet which he does not care to speak of as conscience. Here was the antidote he required to the "pure and undiluted materialism" which had so paralyzed his moral being in the Principles of Psychology; and, having obtained it, he has been living happily, as we gather, ever since. We have tried to do justice to the originality of Dr. Crozier's conception, but really with indifferent success. That there is a scale by which we are all accustomed to measure the varying values of our thoughts, feelings, and actions hardly needs to be stated; and that there is substantial agreement between men on the same plane of civilization as to the relative values of different mental products is also unquestionably true. What our author has not shown is how this conflicts with the strict scientific position taken in the Principles of Psychology. He does not tell us that he has repudiated the teachings of that work; indeed, he gives us distinctly to understand that, so far as it affirms the dependence of thought upon physical organization, he adheres to it still. If so, he has only built upon it a superstructure which it was always open to him to build; so, why he should find fault with the foundation it is not easy to see. Science goes as far as she can see her way to go in setting forth the relations between the mind of man and the environing universe. It studies also the human mind in its historical manifestations, and tries to unfold the laws of human conduct. It confines itself to facts which are believed to admit of verification and to inferences which have been tested by experience. This is the contribution of Science to the theory of human life. But because Science stops here she does not lay any veto on thought, desire, or hope. She lays a foundation; it is for us to build thereon "gold, silver, precious stones, wood, hay, stubble," each of us according to our own impulse and upon our own responsibility. The fire of experience will "try every man's work