94 INDEX 



Nilsson, 83 

 Nilsson-Ehle, 64, 65 

 Normal curve, 21 



OATS, inheritance in, 64 

 Ovum, 12, 13 



PANGENESIS theory, 14 

 Pearson, Prof. Karl, 9, 32, 78 

 Peas, inheritance in, 51 

 Plant breeding, 82 

 Primulas, inheritance in, 52 

 Pure lines, 45 

 Purity of germ cells, 56 



RABBITS, inheritance in, 63, 69 

 Recombination of characters, 26 

 Reproduction, 12 

 Reversions, 30 



SEGREGATION, 52 

 Sex, inheritance of, 67 

 Shall, G. H., 73, 83 

 Spencer, Herbert, 34 

 Sperm, 12, 13 

 Standard deviation, 23 

 Statistical treatment of heredity, 

 75 



Stature in man, 9, 76 

 Sweet-peas, inheritance in, 10, 

 62 



TELEGONY, 31 

 Thompson, Prof. J. A., 43 

 Tower, Prof., 31 



USE and disuse of organs, 38 



VARIABILITY curves, 19 



skew, 21 



Variation, 18 

 coefficient of, 23 

 continuous and discon- 

 tinuous, 18 



measurement of, 23 

 Variations, classification of, 25 

 Variegation, leaf, 65 



"WALTZING" mice, 10 

 Weismann, Prof., 15 

 Wheat, inheritance in, 65 



YELLOW mice, 66 



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