MERCURIC CHLORIDE ON MAIZE. 
197 
The experiments were then continued as follows: 
(2) U.S. P. B. No. 120 (field corn): 
Checks, 20 19, 20, 20, 20; 
Mercuric chloride (40 minutes), 18, 18, 13,58) 755 
The most injury (retardation) was in seeds as a 40 and 50 minutes. 
just coming up on the sixth day. 
(3) Yellow Dent.—Examined at the end of seven days: 
Checks, 20, 20, 20, 20, 20, 
Mercuric chloride (20 minutes), 20, 20, 20, 20, 20. 
Checks, 20, 20, 20, 20, 20; 
Mercuric chloride (30 minutes) 20, 20, 20, 20, 20. 
Considerable retardation at first, especially in longer exposures. 
Checks, 20, 18, 19, 18, 20; 
Mercuric chloride (50 minutes), 16, 18, 16, 18, 15. 
A few were 
Checks, 20, 20, 20, 20, 20; 
Mercuric chloride (40 minutes), 19, 20, 20, 20, 20. 
Checks, 20, 20, 20, 20, 20; 
Mercuric chloride (50 minutes), 20, 20, 20, 20, 20. 
Scarcely any in the 
20 minute exposure at end of experiment, and all making a good growth. 
(4) White Flint—Examined at the end of eight days: 
Checks, 20, 20, 20, 20, 20; 
Mercuric chloride (20 minutes), 20, 20, 20, 20, 20. 
Checks, 20, 20, 20, 19, 20; 
Mercuric chloride (30 minutes), 19, 20, 19, 20, 20. 
Considerable retardation at first, especially in longer exposures. 
Checks, 19, 20, 20, 20, 20; 
Mercuric chloride (40 minutes), 20, 20, 20, 20, 19. 
Checks, 19, 20, 20, 20, 19; 
Mercuric chloride, (50 minutes) 19, 20, 19, 20, 20, 
Scarcely any in the 
20 minute exposure at end of experiment, and all making a good growth, even the plants 
from seed exposed for 50 minutes. 
(5) Black Mexican, examined at the end of 7 days: 
Checks, 19, 17, 19, 18, 18. 
Mercuric chloride (20 minutes), 16, 18, 18, 19, 17. 
Checks, 17, 17, 19, 20, 19, 
Mercuric chloride (30 minutes), 19, 16, 19, 19, 17. 
(6) Early Evergreen, examined at the end of 8 days: 
Checks, 18, 18, 19, 19, 20. 
Mercuric chloride (20 minutes), 18, 19, 18, 20, 19. 
Checks, 17, 20, 20, 18, 20. 
Mercuric chloride (30 minutes), 18, 19, 17, 19, 19. 
(7) Country Gentleman, examined at the end of 8 days: 
v Checks, 19, 19, 18, 19, 18. 
Mercuric chloride (20 minutes), 19, 20, 19, 19, 19. 
Checks, 16, 18, 19, 18, 20. 
Mercuric chloride (30 minutes), 20, 20, 19, 19, 18. 
The retardation was about the same in 5, 6, and 7. 
the longest periods. 
(8) Old Colony, examined at the end of 7 days: 
Checks, 19, 19, 18, 19, 20. 
Mercuric chloride (20 minutes), 20, 19, 19, 20, 19. 
Checks, 20, 18, 20, 17, 19. 
Mercuric chloride (30 minutes), 17, 19, 17, 17, 20. 
Checks, 20, 18, 15, 20, 16. 
Mercuric chloride (40 minutes), 19, 19, 18, 18. 
Checks, 16, 18, 18, 15, 19. 
Mercuric chloride (50 minutes), 19, 18, 17, 18, 18. 
Checks, 19, 19, 18, 20, 20, 
Mercuric chloride (40 minutes), 18, 19, 19, 18, 17. 
Checks, 20, 19, 18, 19, 18. 
Mercuric chloride (50 minutes), 20, 19, 20, 16, 18. 
Checks, 20, 18, 20, 19, 19. 
Mercuric chloride (40 minutes), 20, 20, 20, 18, 20. 
Checks, 19, 20, 18, 19, 20. 
Mercuric chloride (50 minutes), 20, 18, 19, 17, 20. 
It was most in those exposed for 
There was no serious injury in any. All made good plants. 
Checks, 18, 19, 19, 19, 19. 
Mercuric chloride (40 minutes), 18, 20, 19, 18, 19. 
Checks, 17, 17, 17, 20, 19. 
Mercuric chloride (50 minutes), 18, 16, 18, 17, 19. 
(9) Country Gentleman (another source), examined at the end of 7 days: 
Checks, 19, 19, 18, 19, 19. 
Mercuric chloride (20 minutes), 20, 19, 19, 18, 20. 
Checks, 18, 20, 19, 19, 20. 
Mercuric chloride (30 minutes), 19, 18, 20, 19, 19. 
Checks, 20, 18, 19, 19, 17. 
Mercuric chloride (40 minutes), 16, 16, 18, 20, 18. 
Checks, 20, 20, 18, 19, 19. 
Mercuric chloride (50 minutes), 
~ 
9,18, 088).20), 18. 
Plain retardation in treated seeds of 8 and 9, expecially the longer exposures, but all 
growing well when removed. 
(10) Golden Bantam, examined at the end of 7 days: 
Checks, 15, 15, 13, 13, 16. 
Mercuric chloride, (20 minutes) 12, 16, 16, 14, 16. 
Checks, 16, 13, 14, 17, 14. 
Mercuric chloride (30 minutes), 19, 16, 16, 15, 18. 
Very little retardation of this variety in 20, 30, or 40 minutes’ exposure. 
Checks, 17, 16, 15, 8, 14. 
Mercuric chloride (40 minutes), 18, 18, 16, 16, 16. 
Checks, 14, 14, 12, 17, 17. 
Mercuric chloride (50 minutes), 10, 17, 14, 15, 17. 
In all cases 
100 cc. of the 1:1000 mercuric chloride water was used for each 100 seeds. 
