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 1), 3 p. m. Mixture, 2 parts lime dust, 1 part pyrethrum. Number of 
wornis in plants, 43. 
Result.—August 20, 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 fultstrength. Number of worms 54. 
Result.—August 20, 12 m., 25 living, 8 dead, 21 not present, or 46.3, 14.8, 33.9 per 
cent, respectively. 
EXPERIMENT 4. 
August 19,4 p.m. Mixture equal parts lime and pyrethrum. Worms not counted. 
Result.—August 20, 2 p.m., 19 living, 12 dead, or 61.3 and 38.7 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 pm. Fullstrength pyrethrum. Worms not counted and only a part 
of the row Mg 
Result,—August 20, 3 p. m., 5 living, 6 dead, or 45.5 and 54.5 per cent, respectively. 
The dead worms of experiments | 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 ~vorms 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- A ce a Pees 2 A | Probable 
ene Substance used. | Living. Dead. | Absent. | benefit. 
Leseeeee | | Lime and pyrethrum, equal parts. . 39. 5 23.3 37. 2 60.5 
Dtee meme: | Lime 2 parts, pyrethrum I (Pant. score 46.5 23.3 30. 2 53.5 
Hae oo sont Pyrethrum, fullstrength.............. 46.3 14.8 38.9 | 53. 7 
eos Same as experiment EME 61.3 38.7 |.-..-----. 38.7 
Divecpmetes Same as experiment 2........-...---.- 76. 5 23.5. -eee---- 23.5 
Diss stoke .-- | Same as experiment3......--.-...---. 45.5 DESO reno Saco 54.5 
AVOTAR GS ieee laste ote nner 52.6 29. 7 | 7. ae 47.4 
