1913] Goodspeed: Germination of Tobacco Seed 221 



Further lines of investigation contemplated have to do with 

 the germination of seed taken from capsules still green (see 

 table 3) and taken at various stages during the maturing of the 

 seed capsules on the plant and the relation between the vigor of 

 the plant and the percentage of germination of the seed it pro- 

 duces. In this latter connection it will noted that in table 3 

 in the case of 1909 78/05 the first of the duplicate tests germi- 

 nated to the extent of 97 per cent, while the second showed only 

 46 per cent germination. In this case only the seed used was 

 taken from two plants of N. Tahacuni "Maryland" and not from 

 one individual alone. The seed in the first of the duplicate tests 

 which gave the high percentage of germination was produced 

 by a tall, much-branched plant of 1909 78/05, while that used 

 in the second test which gave the low percentage of germination 

 was taken from a plant of the same year which was relatively 

 inferior in general vegetative characters. 



I am glad to acknowledge my indebtedness to Professor W. A. 

 Setchell for his interest in and suggestions concerning the experi- 

 ments reported upon above, and to Mr. W. G. Perrine, upon 

 whose assistance and cooperation the success of much of the work 

 has depended. 



