248 
On Theories of Association 
Diagram VIII. Regression in Stature. Father and Son. Based upon means obtained by 
Gaussian assumptions from graded but unmeasured stature groups, equal to the eye- 
colour groups. 
8 
£ 7 
5 + 6 
4 
§ 3 
2 
8 
Mean 
l 
] 
2 
3 
4 
5+e 
7 8 
{Short.) Father. {Tall.) 
Diagram IX. Regression in Eye-colour. Father and Son. Based upon means obtained by Gaussian 
assumptions. To be compared with the like regression for stature. 
Mean 
Mean 
8 
1 2 3 4 5& 6 7 8 
[Light.) Father. {Dark.) 
