CHAP. II. 



SUMMARY OF OBSERVATIONS. 



57 





Combining the total number of capsules produced 

 by these plants, and the average number of seeds in 

 each, the above crossed and self-fertilised plants 

 yielded seeds in the proportion of . . . . 100 to 64 



Other plants of this first generation grown under 

 unfavourable conditions and spontaneously self-ferti- 

 lised, yielded seeds in the proportion of . . . 100 to 45 



TJiird Generation <f crossed and self-fertilised Plants. 

 Crossed capsules compared with self-fertilised cap- 

 sules contained seeds in the ratio of ... 100 to 94 



An equal number of crossed and self-fertilised 

 plants, both spontaneously self-fertilised, produced 

 capsules in the ratio of . . ... . . 100 to 38 



And these capsules contained seeds in the ratio of . 100 to 94 



Combining these data, the productiveness of the 

 crossed to the self-fertilised plants, both spontane- 

 ously self-fertilised, was as 100 to 35 



Fourth Generation of crossed and self -fertilised flants. 

 Capsules from flowers on the crossed plants ferti- 

 lised by pollen from another plant, and capsules from 

 flowers on the self-fertilised plants fertilised with their 

 own pollen, contained seeds in the proportion of . 100 to 94 



Fifth Veneration of crossed and self-fertilised Plants. 

 The crossed plants produced spontaneously a vast 

 number more pods (not actually counted) than the 

 self-fertilised, and these contained seeds in the pro- 

 portion of 100 to 89 



Ninth Generation of crossed and self-fertilised Plants. 

 Fourteen crossed plants, spontaneously self-ferti- 

 lised, and fourteen self-fertilised plants spontaneously 

 self-fertilised, yielded capsules (the average number 

 of seeds per capsule not having been ascertained) in 

 the proportion of 100 to 26 



Plants derived from a cross with a fresh Stock com- 

 pared with intercrossed Plants. The offspring of inter- 

 crossed plants of the ninth generation, crossed by a 

 fresh stock, compared with plants of the same stock 

 intercrossed during ten generations, both sets of plants 

 left uncovered and naturally fertilised, produced 

 capsules by weight as 100 to 51 



We see in this table that the crossed plants are 



