The publication of a paper in Biometrika marks, that in the Editors' opinion 
it contains either in method or material something of interest to biometricians. 
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mark their assent to the arguments used or to the conclusions drawn in the paper. 
Drapers' Company Research Memoirs. 
DEPARTMENT OF APPLIED MATHEMATICS, 
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These memoirs will be issued at short intervals. 
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I. Mathematical Contributions to the Theory of Evolution, — XIII. On the 
Theory of Contingency and its Relation to Association and Normal Corre- 
lation. . By Karl Pearson, r.B„S. Issued. Price 4s. 
II. Mathematical Contributions to the Theory of Evolution. — XIV. On the 
Theory of Skew Correlation and Non-linear Regression. By Karl 
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IV. Mathematical Contributions to the Theory of Evolution.— XVI. On Homo- 
typosis in the Animal Kingdom. By Ernest Warren, D.Sc, Alice Lee, 
D.Scr, Edna Lea-Smith, Marion Radford, and Karl Pearson, F.R.S. 
. - [Shortly, 
Studies in National Deterioration. 
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I. On the Relation of Fertility in Man to Social Status, and on the changes 
in this Relation that have taken place in the last 50 years. . - By 
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published by DULAU & CO., 37, SOHO SQUARE, LONDON. 
The following papers have been received. 
(1) Inheritance in Cattle. Part II. By Karl Pearson and Miss A. Barrington, 
(2) . Statistical Observations on Wasps and Bees. By F. Y. Edgewori'H. 
(3) A First Study of Natural Selection in Helicc Arhustorum. By A. P 
Di Cesnola. ' 
(4) An Application of Trigonometrical Tables to the Study of Statistical Data. 
By W. F. Sheppard. 
(5) Variation and Correlation in Vespa Vulgaris. Cooperative Study. 
(6) The Inheritance of Ability. By Edgar Schuster and Miss E. M. Elderton. 
(7) Grades and Deviates. By Francis Galton, F,R.S. 
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