40 
ones were mostly composed of half or two-thirds grown worms. These notes again 
apply equally well to nearly all the other experiments with the powder. The follow- 
ing experiments will therefore be given more concisely. 
Experiment 2. 
August l'Jj 3 p. m. Mixture. "2 parts lime dust, 1 part pyrethrum. Xumber of 
worms in plants. 43. 
Result. — August 30. 11:30 a, m . '20 living. 10 dead. 13 not present, or 46.5. "23.3. 30.2 
per cent, respectively. 
Experiment 3. 
August 19. 3:30 p. m. Mixture pyrethrum fall strength. Xumber of worms 54. 
Result. — August 20. 12 in.. 25 living. 8 dead. 21 not present, or 40.3. 14.8, 35.9 per 
cent, respectively. 
Experiment 4. 
August 19, 4 p. m. Mixture equal parts lime and pyrethrum. Worms not counted. 
Result. — August 20, 2 p. ni., 19 living. 12 dead, or 61.3 and 35.7 per cent, respec- 
tively. 
Experiment 5. 
August 19, 4:30 p. m. Mixture 2 parts lime, 1 part pyrethrum. Worms not 
counted. 
Result. — August 20, 2:30 p. m., 26 living, 8 dead, or 76. 5 and 23.5 per cent, respec- 
tively. 
Experiment 6. 
August 19, 5 p m. Full strength pyrethrum. Worm? not counted and only a part 
of the row dusted. 
Result. — August 20, 3 p, in.. 5 living. 6 dead, or 45.5 and 54.5 per cent, respectively. 
The dead worms of experiments 1 to 6 were kept, for raising any possible parasites, 
until September 3. when they were found to be perfectly dry and were thrown away. 
No parasites had issued from them. 
As checks on experiments 1 to 6 it may be stated that in examining 
the rows carefully to count the actual number of worms in the plants 
no dead worms were found. Numerous other observations upon corn 
of a similar age, and which had not been dusted, verified the one made 
while counting the worms. 
The first 6 experiments and their results may be tabulated for con- 
venience as follows : 
Table VIII, 
Experi- 
ment. 
-:ancc used. 
Living. Dead. 
, k , mr Probable , 
Absent - benefit. 
1 
2 
3 
4 
5 
6 
Lime and pyrethrum, equal parts 
L ; imr 2 parts, pyrethrum 1 part 
Pyrethrum. full strength 
Same as experiment 1 
39.5 
46.5 23.3 
46.3 14.5 
61.3 
76. 5 23. 5 
45.5 54.5 
37. 2 60. 5 
30. 2 53. 5 
38. 9 53. 7 
3S.7 
23.5 
Same as experiment 3 
Averages 
54.5 
52.6 29.7 17.7 47.4 
