208 



NICOTIANA TABACUM. 



CHAP. VI. 



were of nearly equal height, and were greatly superior to their 

 crossed opponents. Four flowers on each plant were fertilised 

 with their own pollen, and four others on the same plants were 

 crossed with pollen from one of the crossed plants growing in 

 another pot. This plan differs from that before followed, in 

 which seedlings from crossed plants again crossed, have been 

 compared with seedlings from self-fertilised plants again self- 

 fertilised. The seeds from the crossed and self-fertilised capsules 

 of the above two plants were placed in separate watch-glasses and 

 compared, but were not weighed ; and in both cases those from 

 the crossed capsules seemed to be rather less numerous than 

 those from the self-fertilised capsules. These seeds were planted 

 in the usual manner, and the heights of the crossed and self- 

 fertilised seedlings, when fully grown, are given in the preceding 

 and following table, LXXXVI. and LXXXVII. 



The seven crossed plants in the first of these two tables average 

 95- 25, and the seven self-fertilised 79 '6 inches in height ; or as 

 100 to 83. In half the pots a crossed plant, and in the other 

 half a self-fertilised plant flowered first. 



We now come to the seedlings raised from the other parent- 

 plant B. 



TABLE LXXXVII. 



Nicotiana tdbacum (Third Generation). 



Seedlings from the Self-fertilised Plant B in Pot III., 



Table LXXXV., of the last or Second Generation. 



