200 On Criminal Anthropometry 
Face Breadth and Cubit. Table XXIX., p. 226. 
/, =0, ^• = - -06773, e = -292839, 
•292839 = 6* -•0007647^^ 
whence 6 = -2928580, r = -2887. 
Face Breadth and Foot. Table XXX., p. 226. 
h=0, A; = --102952, e = -371625, 
•371625 = ^--00176656'^ 
whence 6' = •3717] 60, r = -3632. 
Face Breadth and Height. Table XXXI., p. 226. 
h = 0, A; = --38173, e = -351419, 
•351419 = ^ - -024286^5 - -009185^5 ; 
whence 6' = -3525333, r = -3453. 
Foot and Finger. Table XXXIL, p. 226. 
A = - 10295, ^• = -01169, e = -859268, 
•8592G8 = 6- -000602^^ - -001789^^ - -000249^^ - •0007l3^^ 
whence ^ = -8613318, r = -7587. 
Finger and Cubit. Table XXXIII., p. 226. 
;i = -01169, A; =--06773, e = 1 007431, 
1-007431 = 6- -000396^2 - -000787^' - -000164^^ - -000314^' ; 
whence 6 = 1-0091435, r = -8464 ± 0079. 
As the cubit includes the finger, their correlation may be considered "spurious." 
Let us define " forearm " as the cubit minus the finger; then we can find S..D. and 
mean of forearm, and correlation of forearm and finger, as follows : — 
Let a = forearm, c = cubit, /= finger. 
c = a +f and c/= af+ f\ 
Therefore S{cf) = S{af) + S(f% 
or rfc Of o-c = raf o-a + o- V ' 
_ 7/0 a- c-a-f 
therefore raf = 
which gives the correlation of forearm and finger. Substituting the known values 
of the symbols on the right-hand side we have : 
r„y=-7297. 
