136 On the Inheritance of the Mental and Moral Characters in Man 
that local race is not largely inHuential in this enquiry is based fundamentally 
on the following facts : — 
(fl) The constants of parental heredity deduced from my Family Records, 
made like the School Observations on members of many English 
local races, are closely like results Ibund for such selected breeds as 
race-horses and greyhounds. 
(b) The Family Records and the School Observations are for the fraternal 
relationships in excellent agreement. 
Hence, while I admit the " local race " problem to be of first-class impoi tance 
for many anthropological investigations, I do not think that to a first approxima- 
tion, it has had sensible bearing on our present results. 
So much may be said here about the nature and mariner of collecting our 
material. The absolute classification and tabling has been a work of great labour. 
I have to thank in this matter my group of co-workers at University College, more 
especially Miss Alice Lee, D.Sc. ; Miss Marie Lewenz, M.A., Miss E. Perrin, 
Miss Mary Beeton and Miss Margaret Notcutt have likewise aided me. More 
recently in the pressure of preparation for this lecture Mrs W. F. R. Weldon 
and Miss F. E. Cave have come strenuously to my assistance. The chief labour 
of computing has fallen upon Dr Alice Lee, but a considerable number of the 
tables have been re-done or revised by myself Miss F. E. Cave has either 
computed, or re-worked and computed, a considerable number of the head mea- 
surements and growth with age tables (not here published) necessary for the 
reduction of head measurements to a uniform age. To Miss M. Lewenz I ovve 
aid in the computation of the health, ability and athletics data. In short, 
although / may be giving the Huxley Lecture, the work is essentially the 
result of a co-operative investigation extending over a number of years, and 
depending upon a body of collaborators, without whom it would have been quite 
impossible to deal with, much less to collect, the extensive data on which my 
results entirely depend. 
(ii) Nature of the Theory Applied. 
Much of what I have to say upon this point would not be new to those who 
have examined recent biometric work, and some of it would not be intelligible 
except to the trained mathematician. Still we must strive in broad lines to 
see how the work has been done, and above all, to justify our treatment of the 
psychical characters. 
To illustrate the method I will examine a little at length the degree of 
resemblance of brothers in a physical character. I choose cephalic index and 
this for two reasons : — 
(a) Because from the first few years of life onwards the cephalic index 
scarcely changes with growth. 
