UNIVERSITY OF LONDON, UNIVERSITY COLLEGE 
DEPARTMENT OF APPLIED STATISTICS 
The Biometric Laboratory 
(assisted by a grant from the Worshipful Company of Drapers) 
Until the phenomena of any branch of knowledge have been submiited to measurement 
and number it cannot assume the status and dignity of a science. Francis Galton. 
Under the direction of Professor Karl Pearson, F.R.S, Assistants : Dr Julia 
Bell, E. S, Pearson, B.A. ; Crewdson Benington Student in Anthropometry: 
G. MoRANT, B.Sc, Hon, Research Assistant, J. Henderson, M.A. 
This laboratory provides a complete training in modem statistical methods and 
is especially arranged so as to assist research workers engaged on biometric problems. 
The Francis Galton Eugenics Laboratory 
National Eugenics is the study of agencies under social control, that may improve 
or impair the racial qualities of future generations, either physically or mentally. 
The Laboratory was founded by Sir Francis -Galton and is under the super vison 
of Professor Karl Pearson, F.R.S. Galton Research Fellow : Ethel M. Elderton ; 
Reader in Medical Statistics: M. Greenwood, M.R.C^P., M.R.C.S. Medical Officer: 
Percy Stocks, M.A., M.D. Assistants: E. C. Rhodes, M.A., M. Noel Karn, 
M. MouL and J. O. Irwin, B.A. Secretary: M. B. Child. 
It was the intention of the Founder, that the Laboratory should serve (i) as a 
storehouse of statistical material bearing on the mental and physical conditions in 
man, and the relation of these conditions to inheritance and environment ; (ii) as 
a centre for the publication or other form of distribution of information concerning 
National Eugenics; (iii) as a school for training and assisting research- workers in 
special problems in Eugenics. 
Now jReadyy Cambridge University Press 
New Series, TRACTS FOR COMPUTERS 
This series will endeavour to supply a gap in statistical literature, namely "first aid" 
to the professional computer. 
No. I. Tables of the Digamma and Trigamma Functions. By ELEANOR Pair- 
MAN, M.A. Price 3^. net. 
" I 
Tables foi' summing S — X — — — — : ^ — : ; where the and ^'s are 
«= 1 (A^ + ^1) (A« + ^'2) . • ■ {pni + qix) 
numerical factors. 
No. II. On the Construction of Tables and on Interpolation. Part I. Univariate 
Tables. By Karl Pearson, F.R.S. Price is. gcf. net. 
No. III. On the Construction of Tables and on Interpolation. Part II. Bivariate 
Tables. By Karl Pearson, F.R.S. Price is. gd. net. 
No. IV. Tables of the Logarithms of the Complete F-function to Twelve Figures. 
Reprint with Portrait of A. M. Legendre. Price is. gd. net. 
No. V. Table of Coefficients of Everett's Central-Difference Interpolation For- 
mula. By A. J. Thomson, B.Sc. Price is. gd. net. 
No. VI. Smoothing. By E. C. RHODES, B.A, Priceis.gd.net. 
No. VII. The numerical Evaluations of the Incomplete B-Function or of the 
Integral I (1 - xf-^ dx for Ranges of x between o and i . By H. E. SoPER, 
J 0 
M.A. Price is. gd. net. 
