9 
the number of plants which had appeared above the soil on the given 
dates, 100 seeds of each having been planted : 
I .—Blue vitriol upon corn. 
Date. 
Twenty-four 
hours. 
Date. 
Twenty-four 
hours. 
Water. 
Blue 
vitriol. 
Water. 
Blue 
vitriol. 
May 16. 
57 
5 
Mav 24. 
98 
85 
17. 
96 
45 
25. 
98 
86 
18. 
97 
52 
26.. 
98 
86 
19. 
97 
56 
27.. 
98 
86 
20. 
98 
71 
28. 
98 
87 
21. 
98 
77 
29. 
98 
87 
22. 
98 
79 
30. . 
99 
87 
23. 
98 
80 
31. 
99 
89 
The above table shows that the treatment with blue vitriol prevented 
the germination of some of the seeds and greatly retarded the germi¬ 
nation of most of the others. Many of the plants from the seeds treated 
with the blue vitriol came up feeble, with leaves which appeared as 
though scorched. On June 7, a part of these plants had become 
healthy, but they were as a whole much smaller than those from the 
seed soaked in water only. The set treated with vitrioJ contained 
twenty-eight plants, which were notably weak, and the other set but 
three weak plants. 
The next trial was with a solution of 10 gallons of water containing 
5 pounds of blue vitriol (see Circular 5, of Sect. Yeg. Path. O’. S. Dept. 
Ag., p. 5). The seeds were placed in the solutions on May 28, and 
allowed to remain for three different periods before planting. Exami¬ 
nations were made at the dates indicated, the figures showing the 
number of plants which had appeared above the soil from time to time. 
One hundred seeds were planted in each case as before. 
II .—Blue vitriol upon corn. 
Date. 
Ten minutes. 
Five hours. 
Twenty-four 
hours. 
Water. 
Blue 
vitriol. 
Water. 
Blue 
vitriol. 
Water. 
Blue 
vitriol. 
June 5. 
10 
5 
0 
0 
2 
0 
6. 
57 
41 
20 
7 
40 
20 
7. 
81 
63 
75 
41 
77 
60 
8. 
91 
85 
91 
72 
87 
75 
9.. 
95 
87 
93 
85 
89 
79 
10. 
95 
89 
93 
87 
91 
88 
11. 
95 
92 
93 
91 
93 
93 
