PLATE i 
Method of growing the wheat seedlings for study of specialized races. 
A. —Bell jar and battery jar used as incubation chambers, and pots containing wheat 
seedlings, showing method of separating the plants in each pot into two groups, one 
group being inoculated and the other used as control. 
B. —Tub covered with window sash, used as an incubation chamber. Half the 
plants in the pots were inoculated, the pot placed in the tub in about 2 inches of water 
and the tub covered with the sash for 48 hours. 
(402) 
