Vol. y. Parts I and II. October 1906 
. 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 FRANCIS GALTON 
AND. IN COLLABORATION WITH 
C. B. DAVENPORT W. R. MACDONELL 
W. PALIN ELDERTON RAYMOND PEARL 
BY 
KARL PEARSON 
CAMBRIDGE 
AT THE UNIVERSITY PRESS 
LONDON: CAMBBIDGB UNIVERSITY PRESS WAREHOUSE, FETTER LANE 
(C. F, CLAY, Manages) 
AND H, K. LEWIS, GOWER STREET 
NEW IOBK: O. p. PUTNAM'S SONS 
LEIFSIC: BBOCKHAVS 
BOMBAY AND OALOUITAI MAOMIU:iAN AND CO., LIUITBD 
Entered at the New York Post 0£Sce as Second Class Matter. 
Price Twenty Shillings net, 
[Isiued November 30, 1906] , >^^ef<TiP" I'li ''/>./■ 
DEC 10 1906 
