XXXIV. SLEEP: Its Physiology, Pathology, Hygiene, and Psychology. By Marie de Manaceïne (St. Petersburg). Illustrated.
XXXV. THE NATURAL HISTORY OF DIGESTION. By A. Lockhart Gillespie, M.D., F.R.C.P. Ed., F.R.S. Ed. With a large number of Illustrations and Diagrams.
"Dr. Gillespie's work is one that has been greatly needed. No comprehensive collation of this kind exists in recent English Literature."—American Journal of the Medical Sciences.
XXXVI. DEGENERACY: Its Causes, Signs, and Results. By Professor Eugene S. Talbot, M.D., Chicago. With Illustrations.
"The author is bold, original, and suggestive, and his work is a contribution of real and indeed great value, more so on the whole than anything that has yet appeared in this country."—American Journal of Psychology.
XXXVII. THE RACES OF MAN: A Sketch of Ethnography and Anthropology. By J. Deniker. With 178 Illustrations.
"Dr. Deniker has achieved a success which is well-nigh phenomenal."—British Medical Journal.
XXXVIII. THE PSYCHOLOGY OF RELIGION. An Empirical Study of the Growth of Religious Consciousness. By Edwin Diller Starbuck Ph.D., Assistant Professor of Education, Leland Stanford Junior University.
"No one interested in the study of religious life and experience can afford to neglect this volume."—Morning Herald.
XXXIX. THE CHILD: A Study in the Evolution of Man. By Dr. Alexander Francis Chamberlain, M.A., Ph.D., Lecturer on Anthropology in Clark University, Worcester (Mass.). With Illustrations.