60 
the corn was waered once, immediately after transplanting, and 
bore the removal well. it was kept under shelter, but in well 
lighted rooms, and freely exposed to the air. 
j Experiment 1 .—July 22, at 9 P. M., I applied to. a single hill 
from half a pint to a pint of emulsion “A,” throwing it with a 
small syringe upon the bases of the stalks and surface of the ground. 
For a check upon this experiment, I applied water to another hill 
in the same quantity and in the same way. July 23, 9 A. M., the 
hugs on the first hill were still alive, but torpid. July 24, at 11 
A. M., about one-fifth of the bugs were completely dead; the others 
were still alive, but most of them torpid. July 26, 8 P. M., thirty 
of the bugs were alive and back upon the stalks, apparently unin¬ 
jured, but all the remainder were dead. July 27, 10 A. M., the hill 
was in the same condition. Treated again with emulsion “B,” on 
the 28th, when all the bugs were killed. Those on the hill to which 
water was applied were not injured in the least, but all were back 
again upon the stalks in twenty-four hours. 
Experiment 2 .—Two hills were now selected in the laboratory, each 
containing three stalks of corn about two or three feet high. The 
first was thoroughly treated at 4 o’clock on the afternoon of the 
24th, with emulsion “B,” which was thrown with a syringe upon 
the lower six inches of the stalk and sheath, where it was about 
one-fourth covered with young bugs. The other hill was similarly 
treated with water. At ten the next forenoon about four-fifths of 
the bugs were dead upon the first hill, some of them on the corn, 
and others on the ground. Several small groups were still alive 
under clods, but some of these were also dead. At 10 A. M. on the 
26th, only thirty or forty bugs were found alive upon the corn, and 
all the others were dead. On the 27th the situation was unchanged. 
The bugs upon the hill drenched with water were at first washed 
down upon the ground, but in a few hours were back again upon 
the stalks uninjured. 
Experiment 3 .—I next applied with a hand force-pump eleven 
pints of emulsion “B” to eighteen hills of corn in the field, select¬ 
ing those worst infested by the insects. The weather was hot, and 
bright and dry. To prevent interference from without, the hills 
treated were surrounded by fence boards placed on edge and daubed 
plentifully with coal tar. This application was made at 3 :80 P. M. 
of the 25th, and at 11:30 A. M. of the following day about four- 
fifths of the bugs were entirely dead. The others were active and 
apparently in process of recovery, although some of the fluid still 
remained behind the sheaths of the corn. On the 27th of July, at 
five P. M., I made a careful comparison of the hills treated with 
others adjacent which had not been sprayed, and found that the 
chinch-bugs upon the latter were about five times as numerous as 
upon those to which the emulsion had been applied. The bugs 
remaining within the enclosure were now fully revived and at work 
upon the corn. 
Experiment 4 .—On the 27th of July, at 10 A. M., I applied about a 
gill of an exceedingly strong solution of soapsuds, without kerosene, 
to a hill in the laboratory. In twenty-four hours about four-fifths of 
the bugs were dead, and most of the remainder back upon the 
stalks. 
