148 THE FIRST PRINCIPLES OF HEREDITY 



Tails I 2 3 ' 4 5 6 78 9 10 



FIG. 65. CURVE OF TEN TOSSED COINS. 



(From R. H. Lock, " Recent Progress in the Study of Variation, 

 Heredity, and Evolution.") 



460 470 480 490 500 510 520 530 540 



FIG. 66. CURVE OF PROBABILITY. 



From R. H. Lock, "Recent Progress in the Study of Variation, 

 Heredity, and Evolution."} 



of coins e.g., 999 we approach more and more to the 

 mathematical Curve of Probability as given in Fig. 66. 

 -We find, in other words, that the Curve of Variability 



