414 TricofyloKS Races. 



— 23) — 25 and 27^0. I planted out 165 tricotylous seed- 

 lings from amongst their offspring in pots, as soon as 

 they proved themselves also to be ternary in tlieir lirst 

 whorls of leaves. In the following whorls about half of 

 them reverted to the decussate arrangement. These were 

 thrown away, and only 72 plants which remained ternary 

 were ultimately planted out. They were fairly uniformly 

 distributed over the crops of the five parents. 



From these 72 plants, 72 values, in five groups, were 

 calculated in the following spring (1900). The lowest 

 values, arranged in a series corresponding with the in- 

 creasing values of the five parents, now grandparents, 

 were 9, 8, 13, 8 and 11%, the means 16, 17, 18, 17, and 

 19%, and the maxima 19, 22, 26, 22 and 26%. As we 

 see the five groups did not exhibit any essential differ- 

 ence. The mean value of the previous generation, 12%, 

 had now been exceeded, but the maximum remained the 

 same. 



Let us now summarize the whole experiment in the 

 following table : 



Progress is, as we can see, a continual one. and the 

 selection has been, although perhaps only indirectly, (p. 



