BIOMETEIKA 
A JOURNAL FOR THE STATISTICAL STUDY OF 
BIOLOGICAL PROBLEMS 
FOUNDED BY 
W. F. R. WELDON, FRANCIS GALTON and KARL PEARSON 
EDITED BY 
KARL PEARSON 
VOLUME XI 
November 1915 to May 1917 
CAMBRIDGE 
AT THE UNIVERSITY PRESS 
LONDON: FETTER LANE, E.G. 4 
(C. F. CLAY, Manager) 
AND H. K. LEWIS AND CO., Ltd., 136, GOWER STREET, W.C. 1 
WILLIAM WESLEY AND SON, 28, ESSEX STREET, STRAND, W.C. 2 
EDINBURGH : 100, PRINCES STREET 
CHICAGO : UNIVERSITY OF CHICAGO PRESS 
BOMBAY, CALCUTTA AND MADRAS : MACMILLAN AND CO., LIMITED 
TORONTO : J. M. DENT AND SONS, LIMITED 
TOKYO: THE MABUZEN-KABUSHIKI-KAISHA 
[All rights reserved] 
