Experiment 5.—On the 28th, a half pint of emulsion “0” was 
rown upon a hill in the laboratory, at eleven in the forenoon A_t 
P. M., the bugs were all dead but about a dozen. 4 careful 
arch of the ground and corn three days later discovered but four- 
8n bugs. 
Experiment 6.—ha order to ascertain whether anything was gained 
f„ an application of the emulsion at night, I treated carefully 
irteen hills m the field with emulsion “C,” applying about half 
nt to each hill, at 7 P. M„ of the 28th. The night was warm 
id dry, and next morning at 9 o’clock nine-tenths of the bugs 
;re dead. Those alive were nearly all under the clods where 
me of the groups were molting. A few, accidentally protected by 
dold of a leaf, escaped entirely. Pupae were apparently affected 
a easily as younger individuals. . On the 29th, at 5 P. M., it was 
dimated that ninety to ninety-five per cent, were dead, scattered 
erywhere on the corn,. behind the sheaths and exposed on the 
tlks and leaves, and on the ground at the base of the hill. Most 
J those alive were on the stalks, but some w T ere yet under clods 
f d even in them. On the 2d of August, at 5 P. M., it was con¬ 
ned that four-fifths of the bugs were finally killed, while the 
pers were back behind the sheaths of the corn at work as usual. 
j Experiment A—On the 31st of July, I spread upon a glass slide 
l.thm a layer of emulsion “D” as I could apply with a camel’s- 
]ir brush, and allowed five bugs to crawl over it. Four, whose 
pies were reached by the fluid, died in an hour, but the one 
naming was unaffected. 
Experiment 8 —Upon the same day five ounces of emulsion “D” 
re applied to a hill of corn in the laboratory, at 9 A. M. At 
! D 
M., about ninety per cent, of the bugs were dead. 
Experiment 9 .—August 1, at 12 M., half a pint of emulsion “E” 
s applied to a hill in the laboratory. On the 2d, at 8 A. M., 
m one-half to two-tliirds of the bugs were dead, and those alive 
re collected upon the highest points of ground. August 4, at 
A. M., probably three-fourths of the bugs were found to'have been 
fed. 
Experiment 10 .—August 1, 12 M., applied one half pint of emul- 
n “D”. August 2, 8 A. M., nine-tenths of the bugs were dead. 
pose alive were nearly all on the ground. This dilution with soap 
(is holds much better than that with water 
Experiment 11. —At 12 M., of the 1st, half a pint of emulsion 
p” was also applied. On the 2d, at 8 A. M., one-half of the bugs 
fj’e dead, the others were on the ground and on the stalks. On 
4th of August nearly all were dead. 
"Tie three experiments just described were intended to test the 
ipara.tive efficiency of water, soapsuds and a solution of potash, 
'diluents of the emulsion. The first effects were evidently in favor 
soapsuds, showing that this is at least most prompt in its action. 
h comparison of final effects was interfered with by the fact that 
about this time the bugs on all the hills commenced to die 
Tscriminately, as already detailed. 
