Bui. 1239, U. 5. Dept. of Agriculture. 
Plate II 
Fig. I. — Plants from Seed Sown March 15, Photographed March 25. 
The upper row consists of plants grown from machine-threshed seed; the lower, from band- 
threshed seed. The pots from left to right are: 1. Untreated check; 2. seed immersed 5 
minutes; 3, 10 minutes; 4, 30 minutes; 5, 1 hour; 6, ."> hours; 7. 10 hours. Note the difference 
inland and vigor. 
Fig. 2. — The Same Cultures Photographed 13 Days Later. 
i i 
•ITect of I he coppe 
ulphate nn stand and vigor is even more pronounced than thai 
following the use <>f formaldehyde. 
WHEAT PLANTS GROWN FROM SEED TREATED WITH A 
SOLUTION CONSISTING OF I POUND OF COPPER SULPHATE 
TO 5 GALLONS OF WATER. 
