82 STATISTICAL METHODS. 



Mendelism. 



General Statement. Mendel, '66, de Vries, '00, '00 b , '00 C , 

 '03, Correns, '00, Davenport, '01, Bateson, '02, Castle, '03; 

 critical, Weldon, '02, '03, Pearson, W. 



Plants. Correns, '00, '00 b , '01, '02-'02 C , '03-'03 C , de Vries, 

 '02, '01-'03, Bateson and Saunders, '02 



Animals. Echinoids, Doncaster, '03; poultry, Bateson 

 and Saunders, '02; mice, Darbishire, '02, '03, '03 b , Castle, '03 b , 

 Bateson, '03 b ; rabbits, Woods, '03. 

 Telegoiiy. 



No evidence of, in human statures, Pearson and Lee, '96. 

 Fertility. 



Inherited in man and race-horses, Pearson, Lee, and Bram- 

 ley-Moore, '99; greater fertility in poppy of seeds from cap- 

 sules with a high number of stigmatic bands, Pearson, '02; 

 fertility of medusae with symmetrical bands exceeds that of 

 the unsymmetrical as 3 to 4, Mayer, '01. 

 SELECTION. 



General. Intensity of selection connotes a lessening tf 

 correlation, Pearson, '02 d , p. 23; mediocre individuals not 

 the fittest to survive, Pearson, '02 n , p. 50. 



Man. 50% to 80% of human death-rate selective, Beeton 

 and Pearson, '01. 



Other Animals. Annihilation of the extremes in the. spar- 

 row, Bumpus, '99; percentage death-rate of families of 

 Aphids has inverse correlation with length of antenna of 

 mother (r= -.201 .084), with frontal breadth of mother 

 (r= .184 .084), and with number in newly born brood 

 ( r = -.188 .084); in Carcinus moenas, Weldon, '95, '99; 

 in Clausilia, Weldon, '01. 



Plants. Transformation of skew frequency curve to a sym- 

 metrical one by selection, de Vries, '94, '98; shifting of the 

 mode by selection, de Vries, '99. 



Sexual. Pearson, '96: A a 



Stature of husbands, inches 69.136.126 2.628.089 



" males in general 69 . 215 . 066 2 . 592 . 047 



" wives 63.869 .110 2.303.078 



" adult females in general . . 64. 043 .061 2. 325 .043 



See also Correlation: Assortative mating (p. 75). 



DISSYMMETRY. 



The following values for A have been determined by 

 Duncker, '00 and '03: 



