LIBRARY OF THE LELAND STANFORD JR. UNIVERSITY. A29529 (The rights of translation and of reproduction are reserved.) PREFACE. ABOUT one half of the following essays are, in part, reproductions of articles which have already appeared in different reviews. The third, fourth and fifth papers are reprinted from the Westminster Review, the seventh, eighth and tenth from the Fortnightly Review, and the ninth from the Contemporary Review. In nearly every case considerable alterations and additions have been made, and three of the essays at least (those on Belief, the Free-will Doctrine, and Musical Form) may be regarded as new contributions. The remaining chapters of the volume have not been previously published. The author would tender his best thanks to Professor Bain and to Mr. Herbert Spencer for their kindness in giving him fuller explanations of their published views. He would also express his obligations to Professor Bain, to the Rev. J. E. Odgers, M.A., and to Dr. Bartley, for their valuable assistance in the revision of the proof-sheets. Physical and mental data furnished by evolution to this science Possible objection to the separate study of the individual consciousness Justification of this separation, by logical, scientific and practical con- Parts of the science which necessarily involve a recognition of the Difficulties in the application of the hypothesis to the phenomena of the Bearing of the Evolution hypothesis on the Relativity of knowledge:- (b) Respecting a Substance of Mind NEW THEORIES OF EMOTIONAL EXPRESSION. (b) The process by which emotional signs become intelligible 36 RECENT GERMAN EXPERIMENTS WITH SENSATION. (c) The duration of the nervous exhaustion which follows stimulation. General problems of nervous action arising out of these phenomena II. Attempts to measure the Intensive and Extensive magnitude of The subjective or introspective estimate of intensity defective 45 Conception of Sensational intensity as a function of the objec- Absolute and Discriminative Sensibility Relation of discrimination to the absolute magnitude of a sti- (B) Experimental inquiries into the ultimate elements of sensation :— Researches of Helmholtz into the nature of our Sensations of tone (C) Experiments which illustrate and verify known psychological laws :— I. Phenomena dependent on the Transitional nature of consciousness |