CONTENTS 
{All Rights reserved) 
FAQE 
I. Histological Examination of a Case of Albinism. By J. E. Adler, 
F.R.C.S., and J. M^^Intosh, M.D. (With Plates I and II and 
One Diagram in the text) 237 
II. Note on Internal Albinism. By Karl Pearson, F.R.S. . . 244 
III. On a New Method of Determining Correlation, when one Variable is 
given by Alternative and the other by multiple Categories. By 
Karl Pearson, F.R.S '248 
IV. On the Effect of a Differential Fertility on Degeneracy. By Karl 
Pearson, F.R.S. (With Two Diagrams in the text) . . .258 
V. A Statistical Study in Cancer Death-Rates. By G. D. Maynard, 
F.R.C.S.E. (With Three Diagrams in the text) . . .276 
VI. A Quantitative Study of the Morphology of the Fruit of the Blood- 
root, Sanguinaria Canadensis. By J, A. Harris, Ph.D. (With 
Five Diagrams in the text) . . . ... . . 305 
VII. An Objective Study of Mathematical Intelligence. By William 
. Brown, M.A. (With Three Diagrams in the text) . . . 352 
VIII. Darwinism, Biometry and some recent Biology, I. By Karl Pearson, 
F.R,S. (With One Diagram in the text) 368 
IX. Tables to facilitate the Computation of the Probable Errors of the 
Chief Constants of Skew Frequency Distributions. Part II. By 
A. Rhind, B.Sc. (With One Diagram in the text) . .386 
Miscellanea, (i) Dr Galloway's " Canary Breeding." By C. B. Davenport 398 
(ii) Canary Breeding, A Rejoinder to C. B. Davenport. By 
A. Rudolf Galloway, M.D. . . . . .401 
(iii) Inheritance in Canaries, A Study in Mendelism. By 
David Heron, M.A. (With' Three Diagrams in the 
text) 403 
Biometric Notes, (i) An Abac to determine the Probable Errors of Corre- 
lation Coefficients. By David Heron, M.A. (With 
One Diagram in the text) .411 
(ii) On the Probable Error of a Partial Correlation Coefficient. 
By David Heron, M.A. 411 
Book Notes and Bibliography . 413 
The publication of a paper in Biometrika marks that in the Editors' opinion 
it contains either in method or material something of interest to biometricians. 
But the Editors desire it to be distinctly understood that such publication does not 
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Biometrika appears about four times a year. A volume containing about 
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