Correlation and Application of Statistics to Problems of Heredity 35 



accompanying chart for the percentages of these eye-colours in the various 

 generations, and concludes that there has been in these four generations 



Fig. 9. Percentages of Eye-Colour in Successive Generations. 



little secular change in eye-colour. It should, I think, be noted that the 

 Generations III and IV are likely to be much older than Generations I and II 

 when their eye-colours were recorded. Galton's data give the following 



5-2 



