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BIOMETKIKA 
A JOURNAL FOR THE STATISTICAL STUDY OF 
BIOLOGICAL PROBLEMS 
EDITED 
IN CONSULTATION WITH FRANCIS GALTON 
BY 
W. F. R. WELDON KARL PEARSON 
AND 
C. B. DAVENPORT 
VOLUME IV 
June 1905 to March 1906 
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CAMBRIDGE 
AT THE UNIVERSITY PRESS 
LONDON: CAMBRIDGE UNIVERSITY PRESS WAREHOUSE, FETTER LANE 
(C. F. CLAY, Manager) 
AND H. K. LEWIS, GOWER STREET 
NEW YORK : THE MACMILLAN COMPANY 
LEIPSIC : BROCKHAUS 
nOMBAY AND CALCUTTA : MACMILLAN AND CO., LIMITED 
[All Rightu reserved] 
