GENETIC PSYCHOLOGY MONOGRAPHS Bi-monthly, beginning with January. Devoted to child behavior, differential and genetic psychology. Each number a complete research. Six hundred pages per volume. Per annum $7.00, single numbers $2.00. Complete sets at $7.00 per volume, plus transportation. VOLUME I 1926 No. 1. Performance Tests for Children of Pre-School Age No. 2. An Experimental Study of the Eidetic Type Heinrich Klüver Nos. 3 and 4. A Study of Natio-Racial Mental Differences No. 5. A Psychological Study of Juvenile Delinquency by J. W. Bridges and K. M. Banham Bridges No. 6. The Influence of Puberty Praecox on Mental Growth $2.00 $2.00 $3.00 Cloth $3.50 $2.00 $2.00 Arnold Gesell VOLUME II Nos. 1 and 2. The Mind of a Gorilla $3.00 Robert M. Yerkes No. 3. The Role of Eye-Muscles and Mouth-Muscles in the Expression of the Emotions $2.00 No. 6. The Mind of a Gorilla: Part II. Mental Development $2.00 Submit all manuscripts and send all communications to CLARK UNIVERSITY PRESS Worcester, Massachusetts U. S. A. Carl Murchison, Director In cooperation with the Oxford University Press, The Clark University Press has recently been organized in cooperation with the Oxford University Press for the publication of distinctive and important books in certain definite fields of scholarship. The fields of special interest will be Biological Science, Culture and Society, Diplomacy and International Relations, Economics, Geography, History, and Psychology. The Clark University Press invites manuscripts from competent scholars in the above fields. As a result of effectiveness in organization the Clark University Press is prepared to render a more detailed and competent editorial and publishing service than is usual in the field of scholarly publication. The Clark University Press is owned and operated by Clark University. In addition to books it publishes the various scientific journals which are owned by Clark University. CLARK UNIVERSITY PRESS Worcester, Massachusetts U. S. A. And Journal of Genetic Psychology Editors CARL MURCHISON, Clark University Bird T. Baldwin, State University of Iowa; William H. Burnham, Clark University; Cyril Burt, University of London; Ed. Claparède, Université de Genève; Edmund S. Conklin, University of Oregon; Arnold Gesell, Yale University; William Healy, Judge Baker Foundation, Boston; Walter S. Hunter, Clark University; Truman L. Kelley, Stanford University; K. S. Lashley, Institute for Juvenile Research, Chicago; Henri Piéron, Université de Paris; Sante de Sanctis, R. Università di Roma; William Stern, Hamburgische Universität; Calvin P. Stone, Stanford University; Lewis M. Terman, Stanford University; Godfrey Thomson, University of Edinburgh; E. L. Thorndike, Columbia University; John B. Watson, New York City; Helen Thompson Woolley, Columbia University. Quarterly, published in March, June, September and CLARK UNIVERSITY PRESS Worcester, Massachusetts U. S. A. Editors EDWARD BRADFORD TITCHENER, Cornell University CARL MURCHISON, Clark University Frank Angell, Stanford University; F. C. Bartlett, Cambridge University; G. S. Brett, University of Toronto; Karl Bühler, Universität, Wien; Raymond Dodge, Yale University; James Drever, University of Edinburgh; Knight Dunlap, Johns Hopkins University; Shepherd Ivory Franz, University of California at Los Angeles; H. L. Hollingworth, Columbia University; T. A. Hunter, Victoria University College, New Zealand; F. Kiesow, Regia Università degli Studi, Torino; Otto Klemm, Universität, Leipzig; William McDougall, Duke University; Walter Miles, Stanford University; John Paul Nafe, Clark University; C. E. Spearman, University of London; Edward C. Tolman, University of California; John B. Watson, New York City; Albert P. Weiss, Ohio State University; H. P. Weld, Cornell University; Raymond H. Wheeler, University of Kansas; R. W. Wilcocks, University of Stellenbosch, South Africa; Clark Wissler, Yale University; Robert M. Yerkes, Yale University. Quarterly, published in January, April, July, and Octo- CLARK UNIVERSITY PRESS Worcester, Massachusetts |