Vol. VII. Part III. 
April 1910 
BIOMETEIKA 
A JOURNAL FOR THE STATISTICAL STUDY OF 
BIOLOGICAL PROBLEMS 
FOUNDED BY 
W. F. R. WELDON, FRANCIS GALTON and KARL PEARSON 
EDITED 
IN CONSULTATION WITH SIR FRANCIS GALTON 
BY 
KARL PEARSON 
CAMBRIDGE 
AT THE UNIVERSITY PRESS 
LONDON: FETTER LANE, E.G. 
(0. F. CLAY, Managbk) 
AND H. K. LEWJS, GOWEB STREET 
EDINBtmaH : 100, FRINGES STREET 
HEW YORK:. G. P. PUTNAM'S SONS 
BERLIN: A. ASHER AND CO. 
I/EIPSIO: BR0CKHAU8 
BOUBAT AND CALCUTTA: MACMILLAN AND CO., LIMITED 
Entered at the New York Post Office as Second Class Matter 
Price Ten Shillings net. 
Jttutd April 26, 1910] 
