LONGEVITY OF THE SEEDS OF CEREALS, CLOVERS, AND TIMOTHY 25 1 
publication, has been proved to be true in alfalfa. The samples contained 
too 
ao 
5^ 
Fig. 5. Longevity curve for red clover, 
a considerable proportion of "hard seeds," and for a few years the germina- 
tion percentage increased as they became permeable. 
Seed Laboratory, 
Ottawa, Canada 
