UNIVERSITY OF LONDON, UNIVERSITY COLLEGE 
The Blometpic Laboratory 
(assisted by a grant from the Worshipful Company of Drapers) 
Until the phenomena of any branch of knowledge have been submitted . 
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. Assis- 
tant: E. C. Rhodes, M.A. ; Crewdson Benington Student in Anthro- 
pometry : Miriam L. Tildesley. Research Assistant, H. E. Soper, 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 supervision of Professor ^Karl Pearson, F.R.S. Assistants: 
Galton Research Fellow: Ethel M. Eiderton; Mary Seegar, B.Sc, 
M. Noel Karn. Secretary : M. Moul. 
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 pubhcation or' 
other form of distribution of information concerning National Eugenics ; 
(iii) as a school for training an^i assisting research-workers in special 
problems in Eugenics. 
Short courses are provided for those who are engaged in social, 
medical, or anthropometric work. 
Now Ready y Cambridge University Press 
New Series, TRACTS FOR COMPUTERS 
Edited by KARL PEARSON, F.R,S. 
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 Pairman, M.A. .Price is. net. 
00 J - 
Tables for summing S = % -, — : : . ' . , , . , — , where the 
, ^ z-= I {pit + qy) {p2t + -Z^) • • • (P,,l + (In) 
/'s and ^'s are numerical factors. 
