CONTENTS 
{All Rights reserved) 
' PAOa 
I. Some Statistical Observations on Termites, mainly based on the work 
of the late G. D. Haviland. (With One Diagram in the text.) 
By Ernest Warren, D.Sc. . . 329 
II. Note on the Skin-Colour of the Crosses between Negro and White. 
(With Plate I.) By Karl Pearson, F.R.S 348 
III. Ueber die Langenvariatioa der Coniferennadeln. (With 24 Diagrams 
in the text.) Von A. Heyer 354 
IV. Statistical Study of Anti-Typhoid Inoculation. (With One Diagram 
in the text.) By G. D. Maynard . . . . . .366 
V. A Biometric Study of Phagocytosis with Special Reference to the 
Opsonic Index. (With 16 Diagrams in the text.) By M. Green- 
wood, Junr. and J. D. C. White . . . . . .376 
VI. A Biometric Study of the Red Blood Corpuscles of the Common 
Tadpole (Rana temporaria), from the measurements of Ernest 
Warren, D.Sc. (With Two Diagrams in the text.) By Karl 
Pearson, F.R.S . .402 
VII. Data on Variation in the Comb of the Domestic Fowl. (With three 
pages of Diagrams in the text.) By R. and M. D. Pearl . . 420 
Miscellanea, (i) Fecundity of Swine. (With Two Diagrams in the text.) 
By F. M. Surface . 433 
(ii) Frequency Constants of a Variable z-=-f(a:^, x^. By 
R. Pearl . 437 
(iii) The Correlation between a Variable and the Deviation 
of a Dependent Variable from its Probable Value. 
By J. Arthur Harris 438 
Notices and Bibliography 444 
Biometrika appears about four times a year, A volume containing about 
500 pages, with plates and tables, is issued annually. 
Papers for publication should be sent to Professor Karl Pearson, Uni- 
versity College, London. 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. Diagrams and drawings should 
be sent in a state suitable for direct photographic reproduction, and if on decimal 
paper it should be blue ruled, and the lettering only pencilled. 
Books and oflfprints for review or notice in the bibliography should be sent to 
Prof. Pearson, and, when a second copy is available, to Dr Raymond Pearl, 
Maine Agricultural Experiment Station, Orono, Maine, U.S.A. 
Papers will be accepted in German, French or Italian. In the first 
case the manuscript should be in Roman not German characters. 
Contributors receive 26 copies of their papers free. Twenty-five or fifty 
additional copies may be had on payment of 3/6 or 6/- respectively per sheet of 
eight pages : these should be ordered when the final proof is returned. 
The subscription price, payable in advance, is 30s. net per volume (post free); 
single numbers 10s. net Volumes I, II, III, IV, V and VI (1902 — 9) complete, 
30s. net per volume. Bound in Buckram 34/6 net per volume. Index to Volumes 
I to V, 2s. net. Subscriptions may be sent to C. F. Clay, Cambridge University 
Press, Fetter Lane, London, E.G., either direct or through any bookseller, and 
communications respecting advertisements should also be addressed to C. F. Clay. 
* Till further notice new subscribers to Biometrika may obtain Vols. I — VI 
together for £7. lOs.-^or bound in Buckram for £8, 15s. 
