62 
Experiment 12 — At 2 P. M., on August 2, half a pint of ernui 
sion “D” was, applied to the worst hill in the laboratory. Aligns 
3, at 9:30 A. M., nine-tenths of the bugs were dead; the othei 
were scattered on the ground. August 4, 8 A. M., ninety-five p c 
cent, of the bugs were dead, and the others were still torpid on ti 
ground. 
Experiment 13— On the 2d, at 5 P. M., applied one-lialf pints 
emulsion “F” to a hill in the laboratory. At 10 A. M., on the $ 
fully ninety per cent, of the bugs were dead. 
Experiment 14. —The next experiment was made on the 2d of Ac 
gust, at 5 P. M., when a half-pint of emulsion “C” was applied! 
several hills of corn in the field. At 11 A. M. on the following daj 
nine-tenths of the bugs were found to be dead. 
Experiment 15 — On the 18th of August one of my assistants, M 
A. B. Seymour, applied a quart of emulsion “D” to four hills i 
corn at noon, stirring the mixture just as it was applied, and at 
P. M., nearly all the bugs were found to be dead. 
Experiment 16.- He next applied a quart of emulsion “H” 
three hills of corn at 6 P. M., with equal effect. 
Experiment 17— In another experiment, made on the 19th of Ai 
gust, with the same fluid, ninety to ninety-five per cent, of the but 
were found dead three days later. A half-pint was poured upon eac 
hill from a common garden sprinkler. 
Experiment 18— On the 22d he sprinkled upon different hills equi 
quantities of emulsions “D ? ’ and “H,” and found, two days late 
that about ninety-five per cent, of the bugs treated with emulsio 
“D” were dead, and about three-fourths of those upon which emu 
sion “H” had been used. 
Experiment 19.— On the 18th he made a mechanical mixture 
one part of kerosene to twenty parts of the second solution, applyii 
one quart to two hills of corn at noon, sprinkling the entire plan 
At 6 P. M. nine-tenths of the bugs were dead, and no injury to tl 
corn appeared. 
Experiment 20.— On the 22d, at 12 M., he made an experiment! 
compare the effects of an emulsion of soapsuds, one of fresh mill 
both diluted with clear water, and also the simple mixture of kei 
sene and soapsuds. He applied them with a sprinkler, and exai 
ined the hills at 9 A. M. of the following day, when all the fluid 
used were found to have been about equally effective, destroyii) 
from ninety to ninety-five per cent, of the bugs. 
Experiment 21. —In a final trial, two hills each were treated at til 
same time with one-half pint of emulsions “II,” “I,” “B” and “w 
and with mechanical mixtures of kerosene and water—one contaii 
ing two and one-half per cent, of kerosene and the other three and on 
half per cent. The result of this experiment showed that the^soa 
emulsion was a little less effective than that with milk (“H”l 
stroying only about sixty per cent, of the bugs, while “B” kill* 
eighty per cent.), and that the simple mixtures were the mof 
effective of all. That containing one pint of kerosene to forty 1 
water, killed eighty per cent, of the bugs, while the mixture oi o [! 
to thirty killed ninety-eight per cent. 
