Vol. VII. Parts I. and II. 
July and October 1909 
BIOMETEIKA 
A JOURNAL FOR THE STATISTICAL STUDY OF 
BIOLOGICAL PROBLEMS 
FOUNDED BY 
W. F. E. WELDON, FRANCIS GALTON and KARL PEARSON 
EDITED 
IN CONSULTATION WITH SIR FRANCIS GALTON 
AND IN COLLABORATION WITH 
C. B. DAVENPORT W. R. MACDONELL 
W. PALIN ELDERTON RAYMOND PEARL 
BY 
KARL PEARSON 
CAMBRIDGE 
At THE UNlVEESITY PRESS 
LONDON: FETTEE LANE, E.G. 
(C. F. CLAY, Manager) 
AND H. K. LEWIS, GOWEE STEEET 
EDINBUBOH : 100, PRINCES STREET 
NEW YORK : G. P. PUTNAM'S SONS 
BERLIN: A. ASBEB AND CO. 
LEIPSIC: BEOCKHAUS 
BOMBAY AND CALCDTTA: MACMILLAN AND CO., LIMITED 
Entered at the New York Post Office as Second Class Matter 
Price Tiventy Shillings net. 
[Ismed October 22, 1909] 
