CONTENTS 
{All Eights reserved) 
PAOB 
I. On the Eesult of Crossing Japanese Waltzing Mice with Albino Mice. 
By A. D. Darbishire. (With eight Figures in text.). . . 1 
II. Graduation of a Sickness Table by Makeham's Hypothesis. By JoHN 
Spencer 52 
III. Preliminary Note on the Protective Value of Colour in Mantis 
Religiosa. By A. P. di Cesnola, (With two Figures in text.) . 58 
IV. Measurements of One Hundred and Thirty Criminals. By G. B. 
Griffiths. With Introductory Note by H. B. Donkin. (With 
two folding Tables.) . 60 
V. A First Study of the Weight, Variability, and Correlation of the Human 
Viscera, with special reference to the Healthy and Diseased Heart. 
By M. Greenwood, Junr. . . 68 
VI, Sui Massimi delle Curve Dimorfiche. Da Fernando de fl^:LGUERO. 
(With eight Figures in text.) 84 
Miscellanea, (i) On some Dangers of Extrapolation. By Emily Perrin. 
(With a Diagram.) . . . . . . .99 
(ii) ^ On Differentiation and Homotyposis in the Leaves of 
Fagus Sylvatica. By Karl Pearson and Marion 
Radford, (With Plates I. and II,) . . . .104 
(iii) Albinism in Sicily and Mendel's Laws, By W. F. R. 
Weldon .107 
(iv) A Mendelian's View of the Law of Ancestral Heredity, 
By Karl Pearson 109 
Biometrika will appear about four times a year. A volume containing 
about 400 pages, with plates and tables, will be issued annually. 
Papers for publication should be sent to Professor W. F, R. Weldon, 
Merton Lea, Oxford, to Professor Karl Pearson, 7, Well Road, Hampstead, 
London, or to Professor C. B. Davenport, University of Chicago, Illinois, U.S. 
It is very desirable that a copy of all measurements made, not necessarily 
for publication, should accompany each paper. In all cases the papers themselves 
should contain not only the calculated constants, but the distributions from 
which they have been deduced. 
Papers will be accepted in German, French or Italian. In the first 
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Contributors receive 25 copies of their papers free. Twenty-five or fifty 
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All communications, other than those" relating to contributions, should 
be addressed to the University Press, Cambridge. 
The subscription price, payable in advance, is 30s. net per volume (post free) ; 
single numbers IO5. net. Volumes I and II (1902—3) complete, 30s. net per 
volume. Bound in Buckram 34/6 net per volume. Subscriptions may be sent 
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