43° 



BOTANICAL GAZETTE 



|.l U.N E 



changes in the permeability of the seed coat. It is certainly not 

 a matter of embryo changes. 



TABLE II 



Germination of treated and untreated lettuce seed 



Germination 



Soaked in H,0 

 24 brs. 



Black-seeded butter 



i9°9 



1910 



1911 



I9 12 



Prize head — 



1909 



1910 



1911 



I9 12 



It appears, from a study of the records kept in this work, that 



not only the total germination, but also the rapidity or energy of 



germination is greater in treated than in untreated seeds. This is 



shown in table III. 



TABLE III 



Rapidity or germination of treated and untreated seeds* 



Alfalfa 



White clover . . 

 Perennial peas . 

 Perennial peas. 



Lupines 



Delphinium . . . 

 Sweet peas. . . . 

 Sweet peas. . . . 



Germination after 



3 days 



3 " 



4 " 



* For final germination percentage of these samples see table I. 



Such rapidity of germination would clearly be of advantage in 

 making the crop uniform in size and age, and in keeping down 

 weeds. Indeed, it may be said truly that vigor of germination 

 and vigor of the plants produced are more important than merely 

 high germination percentage. Plants that get a good strong start 



