. 
138 . REPORT OF THE OOMMISSIONER OF AGRICULTURE 
- (78) Added 1 ounce of muriatic acid to 1 ounce of carbon bisulphide. , Confined 
it twenty minutes. Leaves uninjured; one-half of the Icerye were killed. 
(79) To residue of above was added three-fourths of an ounce of quicklime, Con- 
fined it twenty minutes. One-half of the leaves on the lower half of the tree were 
killed; found no living Iceryz on lower half of the tree, but found several on the 
upper half, nearly all of those at the very top of the tree being alive. 
be ae Same as in experiment 78. Leaves uninjured; one-third of the iceryse were 
illed. 
(81) Added residue of above to 1 ounce of quicklime. Confined it twenty min- 
utes. One-half of the leaves on the lower half of the tree were killed; four-fifths 
of the iceryz on the lower half of the tree were killed, but only about one-half 
of those on the upper half. 
(82) Added 14 ounces of muriatic acid to half an ounce of potassium cyanide. Con- 
fined it twenty minutes. Residue of the color of claret wine. Leaves uninjured; 
found only 3 living Iceryee. 
(83) Added residue of above to 1 ounce of quicklime. Confined it twenty min- 
utes. Liquid part of residue deep green, upon which floated a deep-blue substance. 
All the leaves on upper third of the tree were killed; found.no living Iceryee. 
(84) Added 14 ounces of water to half an ounce of potassium cyanide. Confined 
it twenty minutes. No leaves nor Iceryz were killed. 
(85) Added residue of above to 1 ounce of quicklime. Confined it twenty min- 
utes. No leaves and only a few Iceryze were killed. 
(86) Added three-fourths of an ounce of muriatic acid to one-half an ounce of 
chloroform. Confined it twenty minutes. No leaves nor Icerye were killed. 
(87) Added residue of above to 1 ounce of quicklime. Confined it twenty min- 
utes. Leaves uninjured; nearly all of the Iceryz on the lower third of the tree 
were killed, but nearly all of those on the upper third were alive. 
(88) Diluted half an ounce of chloroform with the same quantity of water, and 
added it to 1 ounce of quicklime. Confined it twenty minutes. No leaves and 
only a few of the Iceryz were killed. 
(89) Added 1 ounce of muriatic acid to 1 ounce of benzine. Confined it twenty 
minutes. No leaves and only a few Iceryz were killed. 
(90) Added residue of above to 1 ounce of quicklime. Confined it twenty min- 
utes. No leaves and only a few of the Iceryz were killed. 
(91) Diluted 1 ounce of benzine with half an ounce of water, and added it to 1 
ee of quicklime. Confined it twenty minutes. No leaves nor Iceryz were 
ed. 
(92) Added 18 ounces of sulphuric acid (density 65°, as ascertained by the hydro- 
meter) to 10 ounces of the best grade of fused potassium cyanide under the tent. 
Stirred air in tent five minutes with tin blower, then waited ten minutes, and again 
stirred it for five minutes. Left tent on tree from 3.30 to 4 o’clock p. m.; sun shin- 
ing brightly. Tree 12 feet high by 10 feet in diameter; bottom of tent resting on 
ground. One-twelfth of the leaves and nineteen-twentieths of the Iceryz were 
killed; fruit uninjured. A slightly larger pereentage of the eggs hatched out than 
in the following experiment. 
(93) Added 14 ounces of sulphuric acid to 10 ounces of potassium cyanide and 1 
ounce of bicarbonate of soda. Stirred air in tent as before. Left tent on tree from 
4.30 to 5 o'clock p. m.; sun shining brightly. A mandarin tree, 12 feet tall. Only 
a few leaves were killed; fruit uninjured. Forty-nine-fiftieths of the Iceryz and 
nearly all of the eggs were killed. 
(94) Dissolved 2 ounces of potassium cyanide in 3 pints and 14 ounces of water. 
Added 13 ounces of sulphuric acid to 20 ounces of this solution. Stirred air in tent 
as before. Left tent on tree from 38 to 3.30 o’clock p. m.; sun shining brightly. 
Tree 12 feet tall. Two-fifths of the leaves, two-thirds of the fruit, and all of the 
Icerye and eggs were killed. 
(95) Added 13 ounces of sulphuric acid to 20 ounces of the cyanide solution of the 
preceding experiment, in which had been stirred 1 ounce of bicarbonate of soda. 
Stirred air in tent as before. Left tent on tree from 3.50 to 4.20 o’clock p.m.; sun 
shining. Tree 12 feet tall. After treatment the tent was simply lifted up to allow 
the gas to escape, after which it was again placed over the tree, and the doorwa 
left partially open; it remained over the tree for a whole week, when it was removed, 
Fourteen-fifteenths of the leaves, five-sixths of the fruit, and all of the Icerya and 
eges were killed. 
(96) Stirred 4 ounces of water into 11 ounces of bicarbonate of soda, and added it 
to 114 ounces of the cyanide solution of experiment 94. To this were added 7} 
ounces of sulphuric acid. Stirred air in tent as before. Left tent on tree from 3.05 
to 3.85 p.m.; sun shining. Tree 10 feet tall. One-fifteenth of the leaves, thirty- 
nine-fortieths of the Iceryz, and nearly all of the eggs were killed. 
