FRETS, THE INDEX CEPHALICUS. 493 

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Table 3. 639 brothers and 639 sisters. 
BROTHERS SISTERS 
pe | Dan Calcul. BSR Calcul. 
| vations vations 
AEN OCE One MEN. 
71 1 
72 1 3 1 
73 3 6 ey hile: 
74 9 10 gel 5 
75 15 18 eee 10 
16 26 29 19008750 
77 49 43 35 33 
78 64 57 64 NC 749 
79 85 69 62 66 
80 79 7 85. | 80 
81 TA 2077 901.186 
82 RAT 74 en Be 
83 ASS SD 68 70 
84 31 44 Neier. SA 
85 32 32 37 37 
86 26 20 20 23 
87 13 12 12 12 
88 A 6 3 6 
89 4 3 7 3 
90 2 1° 2 1 
91 1 2 
92 2 
total» 1... 639 639 639 639 
My = 80.59 M, = 81.12 
ete 327, 2029 07 
To compare the variability of the shape of head of man still 
more exactly with that of woman, the brothers and the sisters are 
gathered from the material, taking from every family as many 
brothers as sisters. Tab. 3. shows the variability and the distribution 
of frequency of the indices. For 639 brothers and 639 sisters we 
find for the brothers M + vo — 80.593 + 3.27 and for the sisters 
M + oc = 81.12 + 2.97. GaLTon’s quartiles are for the brothers 
