148 THE FIRST PRINCIPLES OF HEREDITY 



Tails I 



2 3 4 5 6 7 8 



Fig. 65. — Curve of Ten Tossed Coins. 







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



Heredity, and Evolution.") 



4b0 



470 



430 



490 



500 



510 



S20 



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 ProbabiHty as given in Fig. 66. 

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



^HOPETiTY OF 



III It. COaEGE LIBRARY 



