SCIENCE PROGRESS 



Mendelism and the Problem of Mental Defect. III. On the Graduated Character 

 of Mental Defect and on the Need for Standardising Judgments as to the 

 Grade of Social Inefficiency which shall Involve Segregation. Being a 

 Lecture delivered at the Galton Laboratory, February 10, 1914. By Karl 

 Pearson, F.R.S., Galton Professor. With Frontispiece and 23 Diagrams. 

 London : Dulau & Co., Ltd., 37, Soho Square, W., 1914. (Pp. 51.) Price 

 2s. net. 



Directions for a Practical Course in Chemical Physiology. By W. Cramer, PhD., 

 D.Sc. Second Edition. Longmans, Green & Co., 39, Paternoster Row, 

 London; New York, Bombay, and Calcutta, 191 5. (Pp. viii + 102.) Price 

 3s. net.) 



The Analysis of Sensations and the Relation of the Physical to the Psychical. 

 By Dr. Ernst Mach, Emeritus Professor in the University of Vienna. Trans- 

 lated from the First German Edition by C. M. Williams. Revised and 

 Supplemented from the Fifth German Edition by Sydney Waterlow. M.A. 

 Chicago and London : The Open Court Publishing Co., 1914. (Pp. xiv + 

 380.) Price 6s. 6d. net. 



The Differential Essence of Religion. By Theodore Schroeder. Reprinted from 

 the New York Truth Seeker, October 31 and November 7 and 14, 1914. 

 (Pp. 28.) 



A Statistical Study of American Men of Science. By J. McKeen Cattell, Pro- 

 fessor of Psychology, Columbia University. Reprinted from Science, N.S., 

 vol. xxiv. No. 621, pp. 658-65, November 23 ; No. 622, pp. 699-707, 

 November 30 ; No. 623, pp. 732-42, December 7, 1906 ; and under the 

 title, " A Further Statistical Study of American Men of Science," vol. xxxii. 

 No. 827, pp. 633-48, November 4 ; No. 828, pp. 672-88, 1910. (Pp 59.) 



Science and Education. Vol. iii. University Control. A Series of Volumes for 

 the Promotion of Scientific Research and Education Progress. Edited by 

 J. McKeen Cattell, Professor of Psychology, Columbia University. Together 

 with a Series of 299 Unsigned Letters by Leading Men of Science holding 

 Academic Positions, and Articles by J. Jastrow, G. T. Ladd, J. McKeen 

 Cattell, and others. The Science Press, New York and Garrison, N.Y., 1913. 

 (Pp. viii + 484.) 



The Principle of Relativity in the Light of the Philosophy of Science. By Paul 

 Carus. With an Appendix containing a Letter from the Rev. James Bradley 

 on the Motion of the Fixed Stars, 1727. Chicago: The Open Court Pub- 

 lishing Co., 1913. (Pp. 105.) Price 4s. net. 



The Mechanistic Principle and the Non-Mechanical. An Inquiry into Funda- 

 mentals, with Extracts from Representatives of Either Side. By Paul Carus. 

 Chicago : The Open Court Publishing Co., 1913. (Pp. 125.) Price 4.9. 

 net. 



Dialogues Concerning Two New Sciences. By Galileo Galilei. Translated from 

 the Italian and Latin into English by Henry Crew and Alfonso de Salvio, of 

 Northwestern University. With an Introduction by Antonio Favaro, of the 

 University of Padua. New York : The Macmillan Co., 1914. (Pp. xxi + 300.) 

 Price 8s. 6d. net. 



All About Leaves. By the late Francis George Heath, Author of " Nervation of 

 Plants," " Our Woodland Trees," " The Fern World," etc. With 80 Photo- 

 graphs from Nature and 4 Coloured Plates from Drawings by Miss M. Schroeder. 

 London : Williams & Norgate, 14, Henrietta Street, Covent Garden, 1914. 

 (Pp. ix + 228.) Price 4s. 6d. net. 



