PLATE 19 
Increased susceptibility to Rhizopus of seeds injured by formaldehyde when dried 
after treatment with a 1 to 320 solution and stored for 18 days. 
A. —Seed uninjured by treatment, having been stored damp. 
B. —Seed killed, having been sealed after drying 7 hours following treatment. 
C. —Seed nearly killed, having been sealed after drying 24 hours following treatment. 
D. —Seed badly injured, having been sealed after drying 3 days following treatment. 
