J. r. Tocher 225 
TABLE LXII. 
Correlations. Hair and Eyes. 
Population 
Contingency 
Coefficient 
Eeturns by 
Reference 
Scottish Children, General, 1903 ... 
Scottish Children, East Aberdeen, 1896 ... 
Scottish Children, Aberdeen City, 1903 ... 
British Schoolboys ... 
Prussian Children 
Jewish Children 
Adult Scottish Population ... 
Male Asylum Inmates 
Female Asylum Inmates ... 
Swedish Conscripts ... 
Italian Conscripts 
Baden Consci'ipts 
•3453 
■3802 
•3.361 
•4203 
•2714 
•3381 
•3673 
•3039 
•2994 
•2495 
•3091 
•3540 
J. F. Tocher 
K. Pearson 
R. Virchow 
J. F. Tocher 
G. Retzius 
R. Livi 
0. Amnion 
This Memoir 
Biometrika, Vol. ill. p. 461 
11 )) 
Biomotrika^ Vol. v. p. 339 
"ii J? 
Biometrika^ Vol. iii. p. 461 
11 11 
11 11 
Mean of above values 
•3312 
more this population in time and through intermarriage was thoroughly crossed, 
or (2) the nearer this population came to consist of members entirely of either 
race, the smaller would be the value of the correlation and the nearer it would 
approach to zero. Looked at from this point of view, a large value for the corre- 
lation would mean heterogeneity in that population and a small value greater 
homogeneity. 
Judging from the above results, the correlation between hnir and eyes does 
not appear very close in any of the countries. With more local groups it is 
probable that in countries like Prussia and Italy less association would be found. 
In the further investigations on the data of this survey, it will be interesting 
to find what values the correlation coetilicients take in the various districts ; 
particularly (a) in those where one type has been found to be predominant, and 
in those sparsely populated parts where two diverse types were found. 
(13) Summary of the Results. 
I. The general result of the Pigmentation Survey of School Children in 
Scotland shows that, of the 502,1.55 childi'en surveyed, about one-fourth are fair- 
haired, one-fourth dark-haired, and nearly one-half belong to two intermediate 
classes embracing the various shades of brown or medium and red hair. The pro- 
portion of the brown or medium class in the boy population is about 43 per cent., 
and in the girl population 41 per cent. The class embracing the various shades of 
red hair constitutes about 5 per cent, of the population. In the dark-haired group 
there are two classes — a large class with dark brown hair approaching to black, 
Biometrika vi '29 
