SELECTION ON THE VARIABILITY AND CORRELATION OF ORGANS. 
33 
Now let us select from the French population a group having the same 
characteristics of the long hones of the leg as the Aino population, and then compare 
the characteristics of the arm bones of this selected group with those of the Aino 
population. 
Our selection is given by : 
= 4077-45-23 = - 4-46, 
= 33-89-36-81 = - 2-92, 
5^ 1-90 pi.. = -827, 
5.= 1-67. 
The following constants must now be determined arithmetically ; 
= 1 •90/2-37 = -802, 
= I-67/1-80 = -928, 
fD_fi£23 _ . ,25 
^ ? 13 
33 - 
1 - ^-13^ 
= -518, 
Gt ’’1274 
^^-329 ^ -515^ 
1 - 1 - r^o" 
1 ’’l2^ ^’23“ + ^^’l2^’l3^’23 
1 ^ 
1 — 
= -196, 
1 >’ 22 " - _ 
1 ■“ '^’ 12 * 
354, 
^'34 0 ~ ^'12“) ’’l 3 ’’l 4 ’A’A + ’’i 2 (^’i 3'74 “t '^1,423) _ 
1 _ 2 — 
^ '12 
If x\ and x\ be the mean humerus and radius ot a femur-tibia selection from the 
French popidation, we have from (Ixv.)— 
x'.^ = 33-01 + -277/^ + -ddS/io, 
= 24-39 + -16241 + -335/10. 
These would give the effect of selecting any femur and tibia defined by and 
from tlie mean values of the humerus and radius. For the particular selection 
indicated above : 
x\ — 30-48, 
= 22-69, 
both of which are about a centimetre in excess of the Aino population. By selecting, 
therefore, from the French, a population with a mean leg like the Aino, we should 
still find the average arm of this population some two centimetres greater in length 
VOL. CC.-A. F 
