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

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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

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