1912] 



Goodspecd: Nicotiana Hyhrids 



105 



Ill-formed 

 seed 



Light 

 seed 



Medium 

 seed "^ 



Heavy 

 seed 



Numbers of 

 weights of seed 



1&2 



3 



4 

 5 

 6 



7 



8 



9 



10 



11 



12 



13 

 14 

 15 

 16 

 17 

 18 

 19 

 20 

 21 

 22 



Heavy seed 

 Medium seed 

 Light seed 



Resembling Resembling 



Inter A'. Tabacum N. Tabacum 



mediates var. rnacrophylla var. virginica 



1 



2 



2 



1 



1 

 1 



2 

 2 

 1 

 1 

 2 

 4 

 1 

 1 

 2 

 3 

 1 

 1 

 2 

 2 



1 

 2 

 1 

 2. 



2 

 2 

 2 

 4 

 2 

 2 

 1 

 4 

 4 

 3 

 3 



o 



2 

 4 

 5 

 3 



2 

 3 

 2 



4 



3 

 1 

 3 

 1 

 3 

 2 



1 

 

 1 

 

 

 2 

 2 

 2 

 

 



Blends 

 2 



1 

 3 

 3 

 3 

 4 

 2 

 3 

 3 

 2 

 3 



3 

 2 

 4 

 2 

 2 

 3 

 3 

 1 

 1 

 2 



19 (24 %) 31 (39 %) 7 (9 %) 22 (28 %) 

 8 (15%) 14 (26%) 13 (25%) 17 (33%) 

 6 (18%) 6 (18%) 11 (33%) 10 (31%) 



No possible statement in tabulated form or otherwise could 

 be included in a paper of this scope which would give any 

 accurate summary of the multitude of combinations of the 

 parental characters in the most widely varying degrees which 

 the 175 F^ generation plants exhibited. Indeed no two indi- 

 vidual judgments on any one plant would coincide except in 

 a general way. Thus, for the table given above, there can be 

 claimed no absolute degree of accuracy. The main results as 

 given, however, were certainly present in a rather marked degree. 

 These results seem to indicate that some correspondence exists 

 between the various weights of first generation hybrid tobacco 

 seed and the appearance of the F, generation plants produced 

 from the various divisions of this seed according to weight. 



