whole." A totality, being an aggregation, lacks the oneness which is essential to a unitary whole. In dealing with the categories, I have followed a pedagogical order; but weighty reasons may be advanced in favor of presenting them in the logical order of their development.
I owe a great debt of gratitude to Dr. J. E. Creighton, of Cornell University. He gave time to the reading of my manuscript, and his suggestions and criticisms have been invaluable. I would also acknowledge aid rendered by Dr. A. H. Jones, of Brown University. But I alone am responsible for what is justly open to adverse criticism. The list of references which follows the text gives the names of a few among the many authors whom I am under obligation. I owe much to authors from whose philosophic doctrines I feel compelled to dissent; naturally few of these appear in that list. But for my wife's encouragement, the publication of this work would not have been undertaken; but for her constant assistance, this Introduction could not have been brought to completion. She has looked up references, criticized statements, read proofs, and prepared the Index.
June, 1913.
