CHAP. III. CROSSED AND SELF-FERTILISED PLANTS. 71 



to that of the self-fertilised was then as 100 to 122. When fully 

 grown they were again measured, as in the following table : 



TABLE XIX. 



The average height of the sixteen intercrossed plants is here 

 9 96 inches, and that of the sixteen self-fertilised plants 10 96, or 

 as 100 to 110 ; so that the intercrossed plants, the progenitors of 

 which had been self-fertilised for the six previous generations, 

 and had been exposed during the whole time to remarkably uni- 

 form conditions, were somewhat inferior in height to the plants 

 of the seventh self-fertilised generation. But as we shall pre- 

 sently see that a similar experiment made after two additional 

 generations of self-fertilisation gave a different result, I know 

 not how far to trust the present one. In three of the five 

 pots in Table XIX. a self-fertilised plant flowered first, and in 

 the other two a crossed plant. These self-fertilised plants were 

 remarkably fertile, for twenty flowers fertilised with their own 

 pollen produced no less than nineteen very fine capsules 1 



