786 



Journal of Agricultural Research 



Vol. VI, No. 20 



planted. In each photograph the two side rows were from one lot of 

 seed over 90 per cent of which germinated in the chamber (Table XII, 

 No. 146785 and 145571), and the middle row, with only a few scattered 

 plants, was from a lot of seed over 90 per cent of which was impermeable 

 (Table XII, No. 140624 and 140670). The same number of seeds was 

 planted in each row and both lots of each kind of seed were planted on 

 the same day. 



Table XII. 



-Seedling production by leguminous seeds in the field compared with germi- 

 nation in a germinating chamber 



3. Figure 5 represents graphically for each lot of seed used in 1913 the 

 percentage of germination in 8 days, the percentage of seedlings pro- 

 duced in the field in from 16 to 18 days, and the sum of percentage of 

 germination and percentage of impermeable seeds. The space between 

 the line at the top of the figure (germination plus impermeable seeds) 

 and the lowest line in the figure (chamber germination) represents the 

 percentage of impermeable seeds in each lot. The line representing 

 chamber germination crosses the line representing seedling production at 

 a point which corresponds to 60 per cent of germination, with nearly all 



