140 REPORT OF THE COMMISSIONER OF AGRICULTURE. 
(109) Added 2 pounds of bicarbonate of soda, made into a thin paste with water, 
o 24 ounces of the cyanide solution of experiment 108; to this was added 20 ounces 
of sulphuric acid. Stirred air in tent as before. Left tent on tree from 12.40 to 
1.10 o'clock p. m.; sun shining. Tree 11 feet tali. One-sixth of the leaves were 
killed; found no living Iceryee. 
(110) Sublimed 1 pound of flowers of sulphur, and passed it into the tent. The 
sulphur was put into an iron vessel having a perforated lid, and this was set on the 
hot charcoal in the upright furnace of an Acme Fumigator; this fumigator is fur- 
nished with a fan-blower, to which I had a tin pipe attached in such a manner that 
the air was drawn out of the top of the tent and forced into the lower part of the 
upright furnace, passing by another pipe out of the upper part of the furnace into 
the lower part of the tent. The sulphur vapor was passed into the tent in fifteen 
minutes, after which the tent was removed from thetree. Tree 10feettall, Three- 
fifths of the leaves, all of the fruit, and four-fifths of the Icerye were killed. 
(111) Sublimed half a pound of sulphur, as in the preceding experiment, and 
passed it through a second horizontal furnace, in the form of a cylinder, about 18 
inches long and 6inches in diameter, filled with red-hot charcoal. Passed it into the 
tent in ten minutes, and left tent on tree ten minutes longer. Tree 10feettall. All 
of the leaves and fruit, many of the twigs, and two-thirds of the Iceryz were killed. 
(112) Sublimed half a pound of sulphur and passed it over hot charcoal, as in the 
preceding experiment. Passed it into the tent in eight minutes, and left tent on 
the tree twenty-two minutes longer. Tree 10 feet tall. Five-sixths of the leaves, 
two-thirds of the fruit, afew of the twigs, and one-half of the Iceryze were killed. 
(113) Sublimed 6 ounces of sulphur and passed the vapor over hot charcoal, as in 
experiment 111. Passed it into the tent in one hour, and then removed the tent. 
Tree 10 feet tall. Hleven-twelfths of the leaves, all of the fruit, and many of the 
twigs were killed; found no living Icerye. 
(114) Sublimed 2 ounces of sulphur and passed the vapor over hot charcoal and 
into the tent. The sulphur was put into a tight iron vessel, through the lid of which 
passed a small pipe leading to the pipe by which a Cummings’ blower was attached 
to the horizontal furnace containing the charcoal; the sulphur was sublimed by the 
use of a small kerosene stove placed beneath the vessel containing the sulphur, and 
as the vapor from the sulphur rose it was blown over the hot charcoal into the tent. 
Passed the vapor into the tent in forty minutes and left the tent on the tree five min- 
utes longer. Tree10feecttall. Seven-cighths of the leaves, alkof the fruit, and many 
of the twigs were killed; found no living Icerye. 
(115) Passed the vapor of 2 ounces of sulphur over hot charcoal and into the tent. 
The furnace was the same as that described in experiment 111, except that it was 
placed vertically and thatits length had been increased to 3 feet; the vessel contain- 
ing the sulphur was led into one side of the furnace, and to its lower end was at- 
tached a piece of gas-pipe leading into the furnace at a point about one-fourth of 
the height of the furnace. The sulphur placed in this weeeel soon melted and ran 
down the gas-pipe and into the furnace, where it was vaporized and its vapor blown 
over the hot charcoal and into the tent through a pipe passing out of the upper 
end of the furnace and leading into the lower part cf the tent. The gas-pipe below 
the vessel containing the sulphur was provided with a stop-cock, to regulate the 
fiow of the meited sulphur. The sulphur was run into the furnace in twenty min- 
utes, and the tent was left on the tree five minutes longer. Tree 10 feet tall. No 
leaves and = a few Ioery ze were killed. 
(116) Run 2 ounces of sulphur into furnace in ten minutes, and allowed the vapor 
to pass over the hot charcoal and into the tent of its own accord. After running 
the sulphur into the furnace for five minutes the air in the tent was stirred with a 
Cumming’s blower, which drew the air out at the top of the tent and forced it in at 
the bottom. Left tent on tree haif an hour. Tree 10 feet tall. Furnace same as 
used in preceding experiment. No leaves and only a few Iceryee were killed. 
(117) Run 2 ounces of sulphur into furnace in ten minutes, then stirred aix in 
tent for five minutes, and tt tent on tree half an hour longer. Thesulphur vapor 
was allowed to pass over the hot charcoal and into the tent of its own accord. 
Furnace same as used in preceding experiment. Tree 10 feet tall. No leaves and 
only a few Icerye were killed. 
(118) Run 8 ounces of sulphur into furnace in fifteen minutes, then stirred air in 
tent for five minutes, and left tent on tree twenty minutes longer. Furnace as in 
preceding experiment: sulphur vapor passed into tent of its own accord. Tree 10 
feet tall. Only a few of the leaves and about one-eighth of the Iceryz were kilied. 
(119) Run 5 ounces of sulphur into furnace, and allowed the vapor to pass into 
the tent of its own accord. After the melted sulphur had run into the furnace for 
eight minutes its flow was stopped, the pipes leading into the tent were discon- 
nected, and the biower was attached to the furnace, and the latter was fired up for 
