16 HEREDITY OF SKIN COLOR IN NEGRO-WHITE CROSSES. 



Table io. Father without factor for negro N; mother with 2 factors for negro N. 



Table ii. Father without factor for negro N; mother with 3 factors for negro N. 



Table 12. Father without factor for negro N; mother with 4 factors for negro N. 



a N 43. 



6 II 8. f\ skin color 53. 32, 



8; II 11 $. skin 45, 32, 10, 13. 



Including I X 25 per cent. 

 * Including 2 N 25 per cent. 



Table 13. Father with 1 factor for negro N; mother without factor for negro N. 



From a mating white X 45 per cent N, the mother probably a 3-factor colored. This man tans heavily 

 and, a^ N - R = 52 per cent, he doubtless has one factor for black. 



