196 On Criminal Anthropometry 
(10) We will now apply these formulae. 
Height and Head Breadth. We first form the 9-fold Table XI. (p. 222). 
Taking Height first, we have : 
?ii = 1054, n, = 920, n, = 1026. 
/;, = -38l73, /23 = -40702, t? = 2. 
Therefore a = " 2-53566 inches, 
|)j = o- X /ii = -967937. 
The mean is therefore 
64^ + -967937 = 65-5304 inches. 
For Head Breadth 
jii = 1077, «.,= 906, '»3 = 1017, 
Ai = -36114, /(3= -415198, t? = -4, 
p^ = a X //i = -186073. 
In finding the mean it is to be noted that the lower boundary of is 14-85 as 
the measurements are taken to the nearest millimetre ; the mean is therefore 
14-85 + -186073 = 15-0361 cm. 
The probable errors of the s.D. are 
Height + -0495 
Head Breadth + 01015. 
Height and Left Middle Finger. Our 4-fold table is Table XII., p. 222 
(see also Table -III., p. 216). 
/t = - -38173, /f = -01169, e = -714334. 
The equation in 6 is : 
-714334 = 6- -002232^2 - -024306^^ - -000849^^ - -000919^% 
whence ^ = -7251964, r = -6633. 
The 9-fold table is Table XIII., p. 222 (see also Table III., p. 216). 
For Finger 
?ii = 706, «2 = 1612, M3 = 682, 
h, = -7214, /;3 = -74769, -q = -8, 
" = r46909 = '^**^^^' 
= h,a = -392842. 
