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BIOMETRIKA. Vol. XII, Parts I and II 
CONTENTS 
PAOli 
I. On the Standard Deviations of Adjusted and Interpolated Values of an 
Observed Polynomial Function and its Constants and the Guidance 
they give towards a Proper Choice of the Distribution of Observations. 
By KiRSTiNE Smith, Copenhagen 1 
.> 
II. On the Product-Moments of Various Orders of the Normal Correlation 
Surface of Two Variates. By K. Pearson and A. W. Young . . 86 
III. The Correlation Coefficient of a Polychoric Table. By A. Ritchie-Scott, 
B.Sc. 9,*? 
IV. On a Formula for the Product-Moment Coefficient of any Order of a 
Normal Frequency Distribution in any Number of Variables. By 
L. IssKELis, D.Sc. . . ' . .134 
V. On the Mathematical Expectation of the Moments of Frequency Dis- 
tributions. By Professor Al. A. Tchouproff of Petrograd. Pacifc I . 
Miscellanea : 
(i) Preliminary Note on the Association of Steadiness and Rapidity of Hand 
with Artistic Capacity. By M. L. Tildesley . . . • | • 
(ii) Sur les moments de la fonction de correlation normale de n variables. 
Par SvERKBR Bebgstrom, Stockholm . . . . • \ ■ 
(iii) Formulae for determining the Mean Values of Products of Deviations of 
mixed Moment Coefficients in two to eight Variables in Samples taken 
from a limited Population. By L. Isserlis, D.Sc 183 
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