The author further observes that "nothing is more common or more confusing than a loose vague and indeterminate use of this phrase" [scientific method] and that his object is "to give definiteness and scientific precision to a much abused expression by showing that the Scientific Method ... is neither more nor less than the SCIENTIFIC THEORY OF UNIVERSALS APPLIED IN PRACTICE TO THE ACQUISITION OF KNOWLEDGE." Now whether or not the identification of the scientific method with the practical application of the theory mentioned, will give the much needed definiteness and precision, depends very much upon the definiteness and precision of that theory itself. The Scientific Theory of Universals, the author tells us, receives "no adequate exposition" in this book. We are in possession, however, of several other publications of the author, one of which—"Scientific Theism"—is largely devoted to that purpose. We will endeavor in a spirit of studious candor and fidelity, to state as well as we can the essentials of that theory. We must protest, however, that we cannot undertake to clear up the obscurity that must necessarily involve any theory that is stated by the aid of such shifty and inconstant terms, as objective, subjective, knowledge, relation, existence, reality, etc., when the same are used without rigorous definitions of the respective senses thereof that are intended. The Scientific Theory of Universals affirms, that objectively real individuals do exist, that objectively real genera do exist, that objectively real relations do exist, that the objectively real genera are in every instance constituted as such by that set of objectively real relations uniquely appropriate to it; that in every instance of a genus the objectively real relations "reproduce" themselves _in specie_ in the mind separate from aught of the objective realities that are brought into relation by them, that these "reproduced" relations in the mind constitute the subjective concept that is designated by the word appropriate thereto, and that the single objective Universal is _at once_ and integrally the objective genus, the subjective concept, and the term or word. The Universe is the _summum genus_, concept and word, which is, means, and expresses the correlated totality of all genera together. Dr. Abbott neglects reference to genera of purely mental existences, and relies for proof of his theory upon the single argument that no postulate is used that Science has not taken for granted, and proved by the finding that the facts are in agreement with the postulates.