CONTENTS. 
Memoirs. 
PAGE 
I. Results of Crossing Grey (House) Mice with Albinos. By E. H. J. 
Schuster, M.A. . 1 
II. Biometrical Studies on Man. I. Variation and CoiTclation in 
Brain-weight. By Raymond Pearl, Ph.D. .... 13 
III. A Study of the Relations of the Brain to the Size of the Head. By 
Reginald J. Gladstone, M.D 105 
IV. On the Bionietric Constants of English Brain-weights. By J. Blake- 
man, M.Sc, assisted by Alice Lee, D.Sc, and Karl Pearson, F.R.S. 1 '24 
V. A Quantitative Study of the Resemblance between Man and Woman. 
By E. TSCHEPOURKOVVSKY IGl 
VI. " Das Fehlergesetz uud seine Verallgemeinerungen durch Fechner 
und Pearson." A Rejoinder. By Karl Pearson, F.R.S. . . 169 
VII. Variation and Correlation in the Earthworm. By Raymond Pearl, 
Ph.D., and Wilbur N. Fuller 213 
VIII. Data for the Problem of Evolution in Man. On Fertility, Duration 
of Life and Reproductive Selection. By A. O. PowYS . . . 233 
IX. Contributions to the Study of Interracial Correlation. By E. 
Tschepourkowsky 286 
X. Statistical Studies in Immunity. Smallpox and Vaccination. By 
John Brownlee, M.A., M.D 313 
XI. On Tests for Linearity of Regression in Frequency Distributions. 
By John Blakeman, M.Sc, B.A 332 
XII. The Long Barrow and Round Barrow Skulls in the Collection of the 
Department of Comparative Anatomy, The Museum, Oxford. By 
E. H. J. Schuster, M.A 351 
XIII. The Egg of Cuculus Canorus. An Attempt to ascertnin from the 
Dimensions of the Cuckoo's Egg if the Species is tending to break 
up into Sub-species, each exhibiting a Preference for some one 
Foster-parent. Second Memoir. By Oswald H. Latter . . 363 
XIV. Tables for Facilitating the Computation of Probable Errors. By 
Winifred Gibson, B.Sc 385 
XV. Cooperative Investigations on Plants. III. On Inheritance in the 
Shirley Poppy. Second Memoir ....... 394 
XVI. On the Inheritance of Coat-Colour in Cattle. Part I. Shorthorn 
Cros.ses and Pure Shorthorns. By Amy Barrington and Karl 
Pearson, F.R.S 427 
