PLATE 5 
Effects of hot-water treatment on germination of hand-threshed seed of 
the variety Haynes Bluestem (C. I. 2874), and on seedling development, as in¬ 
fluenced by integrity of seed coat and length of presoak. (See Table IX.) 
A. —Seed coats unbroken, seed not treated. Germination 96 per cent. 
B. —Seed coats cut over the embryo, seed not presoaked before treatment for 
10 minutes at 54° C. Germination 38 per cent. S 
C. —Seed coats cut over the embryo, seed presoaked for 1 hour before treat¬ 
ment for 10 minutes at 54° C. Germination 19 per cent. 
D. —Seed coats cut over the embryo, seed presoaked for 2 hours before treat¬ 
ment for 10 minutes at 54° C. Germination 15 per cent. 
E. —Seed coats cut over the embryo, seed presoaked for 4 hours before treat¬ 
ment for 10 minutes at 54° C. Germination 4 per cent. 
F. —Seed coats unbroken, wheat presoaked for 10.5 hours before treatment 
for 10 minutes at 54° C. Germination 93 per cent. 
