The subject of this book is of such fundamental importance that, whether or not one agrees with Dr. MacCurdy's method or his conclusions, one must admire the hardihood with which he has approached his subject.

Before commenting on the specific content of the volume, certain general characteristics of Dr. MacCurdy's methods of logical reasoning are worth notice. A salient peculiarity which sometimes makes it difficult to follow the exposition is a tendency to omit steps in the process of a logical argument. Again and again one comes to a 'therefore' which seems in no way justified by the statements which had preceded it. Allied to this, in the sense it gives the reader of the essential privacy of Dr. MacCurdy's thought, is a sort of special pleading—a willingness to ignore any