REPORT OF THE ENTOMOLOGIST. 139 
(97) Poured 3 ounces of arsenic into 16 ounces of muriatic acid, and allowed it to 
stand a }"‘tle over a week, then added it to 16 ounces of quicklime under the tent. 
Stirred air in tent as before. Left tent on tree from 4 to 4.30 p.m.; sun shining. 
Tree 10 feet tall, No leaves nor Iceryz were killed. ; 
(98) Stirred 7 ounces of water into 16 ounces of bicarbonate of soda, and added it 
to 154 ounces of the cyanide solution of experiment 94: to this was added 11 ounces 
of sulphuric acid. Stirred air in tent as before. Left tent on tree from 2.50 to 3.20 
o'clock p. m.; sun shining. Tree 11 feet tall; apeach tree. Very few of the leaves 
and nearly all of the Iceryz were killed. 
(99) Boiled 20 ounces of arsenic and the same of bicarbonate of soda in 3 pints 
of water for one hour. Added 18 ounces of sulphuric acid to 24 ounces of the above 
solution. Stirred air in tent as before. Left tent on tree from 5.45 to 4.150’clock p. 
m.; sun shining. Tree 10 feet tall. No leaves and only a few Iceryse were killed. 
(100) Stirred 6 ounces of water into 144 ounces of bicarbonate of soda, and added 
_it to 154 ounces of the cyanide solution of experiment 94; to this was added 10 
ounces of sulphuric acid. Did not stir the air inthe tent. Left tent on tree from 3 to 
3.30 0’clock p.m.; sun shining. Tree lifeettall. One-half of the leaves were killed; 
found no living Icerye. . 
(191) Stirred 24 ounces of water into 42 ounces of bicarbonate of soda; to this was 
added 11 ounces of sulphuric acid. Stirred air in tent for five minutes after starting, 
waited ten minutes and then stirred it again for five minutes. Left tent on tree from 
3.55 to 4.25 o’clock p. m.; sun shining. Treeii feet tall. Noleaves nor Iceryz were 
killed; the latter were motionless when the tent was first removed from the tree. 
(102) Stirred 12 ounces of water into 31 ounces of bicarbonate of soda, and added 
it to 154 ounces of the cyanide solution of experiment 94; to this was added 12’ounces 
of sulphuric acid. Stirred air in tent as before. Left tent on tree from 2.55 to 3.2 
o’clock p. m.; sun shining. Tree 11 feet tall. Very few leaves were killed; found 
only three living Icerye. 
(103) Stirred a sufficient quantity of water into 11 ounces of bicarbonate of soda 
to make it into a thin paste, and added it to 114 ounces of the cyanide solution of 
experiment 94; to this was added 74 ounces of sulphuric acid. Stirred air in tent 
only five minutes after starting. Left tent on tree from 3.10 to 3.40 o'clock p. m.: 
sun shining. Tree 10 feet tall. Two-thirds of the leaves, nearly all of the fruit, 
and all of the Iceryz were killed. 
(104) Stirred a little water into 1 pound of marble dust, and added it to 114 ounces 
of the cyanide solution of experiment 94; to this was added 8 ounces of sulphuric 
acid. Stirred air in tent as in experiment 101. Left tent on tree from 4.05 to 4.35 
p. m.; sun shining. Tree 10 feet tall. Only a few of the leaves were killed; found 
no living Iceryz. E 
(105) Added 10 ounces of sulphuric acid to 16 ounces of the cyanide solution of ex- 
periment 94, and passed the gas through 24 ounces of sulphuric acid. Stirred air in 
tent as before. Left tent on tree from 2.45 to 3.15 o'clock p. m.; sun shining. Tree 
11 feet tall. Very few of the leaves, none of the fruit, and about forty-nine-fiftieths 
of the Iceryze were killed. The density of the sulphuric acid before the gas passed 
through it was 644°, as indicated by the hydrometer; after the gas had passed through 
it its density was found to be 634°. 
(106) Added 11 ounces of sulphuric acid to 16 ounces of the cyanide solution of 
experiment 94, and passed the gas through 24 ounces of sulphuric acid. Stirred air 
in tent as before. Left tent on tree from 3.50 to 4.20 o’clock p. m.; sun shining. 
Tree 11 feet tall. Very few of the leaves and nearly all of the Iceryz were killed. 
The acid through which the gas was passed had a density of 634°, as indicated by 
the hydrometer. 
(107) Added 16 ounces of sulphuric acid to 26 ounces of the cyanide solution of 
experiment 94, and passed the gas through sulphuric acid. Stirred air in tent as 
before. Left tent on tree from 3.40 to 4.10 o’clock; sun shining. Tree 11 feet tall. 
Leaves scarcely affected; found no living Iceryee. The residue contained acid in 
great excess. 
(108) Dissolved 5 pounds best grade of potassium cyanide in 6 pints of water. I 
first tried to dissolve it in 4 pints of water, but all of the cyanide was not dissolved 
after being boiled for 1 hour; I then added 2 pints of water, when all of the cyanide 
dissolved after being boiled for only afew minutes. Added 16 ounces of sulphuric 
acid to 30 ounces of the above cyanide solution, and passed the gas through sulphuric 
acid. Stirredairintentas before. Thetent had been charged with a small quantity 
of the gas, after which it was opened and allowed to remain on the tree from 11 
o’clock a. m. to 10.30 o’clock a. m. of the following day, when it was charged and 
allowed to remain on the tree for half an hour longer. Tree 11 feet tall. Fourteen- 
fifteenths of the leaves were killed; found no living Icerye. 
