CONTENTS OF VOL. IX. 
Memoirs. 
PAGE 
I. On the Probable Errors of Frequency Constants, Part II. Editorial 1 
II. The Relationship between the Weight of the Seed planted and the 
Characteristics of the Plant produced. By J. Arthur Harris 11 
III. On the Probable Error of a Coefficient of Correlation as found 
from a Fourfold Table. By Karl Pearson .... 22 
IV. Multiple Cases of Disease in the same House. By Karl Pearson 28 
V. A Study of the Variations in the Female Pelvis, based on obser- 
vations made on 217 specimens of the American Indian Squaw. 
By Arthur Brewster Emmons 34 
VI. The Intensity of Natural Selection in Man. By E. C. Snow . 58 
VII. On Errors of Random Sampling in certain cases not suitable for 
the application of a " normal " curve of frequency. By M. 
Greenwood, Junr 69 
VIII. On the Probable Error of the Correlation Coefficient to a Second 
Approximation. By H. E. Soper 91 
IX. On the Measurement of the Influence of "Broad Categories" on 
Correlation. By Karl Pearson 11G 
X. Bibliography of Current Literature, Biometry and Eugenics, 
Nos. 1—362 . . . " 140 
XI. On Theories of Association. By Karl Pearson and David Heron 159 
XII. Anomalies of Pigmentation among Natives of Nyasaland. A 
contribution to the Study of Albinism. By Hugh Stannus 
Stannus 333 
XIII. On the Expectation of Life in Ancient Rome, and in the Provinces 
of Hispania and Lusitania and Africa. By W. R. Macdonell 366 
