Vol. VI. Part I. . March 1908 
BIOMETEIKA 
A JOURNAL FOR THE STATISTICAL STUDY OF 
BIOLOGICAL PROBLEMS 
FOUNDED BY 
W. F. R WELDON, FRANCIS GALTON and KARL PEARSON 
editSd 
IN CONSULTATION WITH FRANCIS GALTON 
AND IN COLLABORATION WITH 
C, B. DAVENPORT W. R. MACDONELL 
W. PALIN ELDERTON RAYMOND PEARL 
BY 
KARL PEARSON 
y 
CAMBRIDGE 
AT THE UNIVEESITY PEESS 
LONDON: CAMBEIDGE UNIVEESITY PKESS WAKEHOUSE, FETTEB LANE 
(C P. CLAY, Manager) 
AND H. K. LEWIS, GOWER STREET 
NEW vobk: g. p. pdtnam's sons 
LEIPSIC : BBOCKHA.DS 
BOMBAY AND CALCUTTA: MACMILLAN AND CO., LIMITED 
Entered at the New York Poet Office as Second Class Matter. 
Price Ten Shillings net. 
[Issutd April 18, 1908] 
