136 REPORT OF THE COMMISSIONER OF AGRICULTURE. 
(84) Took one-third ounce of arsenic and 1} ounces of nitric acid. Confined it 
twenty minutes. Residue greenish. A few leaves at the top of the tree anda 
few of the Iceryze were killed. 
(35) To residue of above was added three-fourths of an ounce of quicklime. Con- 
fined it twenty minutes. All of the leaves and about one-sixth of the iceryee were 
killed. 
(36) Put half an ounce of arsenic in 2 ounces of water, and allowed it to stand for 
several hours. Added three-fourths of an ounce of quicklime to 14 ounces of this 
arsenic solution. Confined it twenty minutes. No leaves nor Iceryz were killed. 
(37) Took one-fiftieth of an ounce of strychnine and 14 ounces of nitric acid. Con- 
fined ittwenty minutes. Residue consisted of a brownish cloud in bottom of gen- 
erator beneath the limpid liquid. No leavesand only a few Icerye were killed. 
(88) To residue of above was added three-fourths of an ounce of auicklime. Con- 
fined it twenty minutes. Liquid portion of residue brownish; the solid portion 
bright yellow. No leaves and only a few Iceryze were killed. 
(89) Put about one one-hundred-and-sixtieth of an ounce of strychnine into half 
an ounce of water and added this to three-fourths of an ounce of quicklime. Con- 
fined it twenty minutes. Noleavesnor Iceryze were killed. 
(40) Took 1 ounce of mercury, stirred into it a little earth, and added 1 fluid ounce 
of nitric acid. Confined it twenty minutes. No leaves nor Iceryz were killed. 
(41) To residue of above was added three-fourths of an ounce of quicklime. 
Confined it twenty minutes. One-half of the leaves, three-fourths of the Iceryz 
on upper part, and one-fourth of those on the lower part of the tree were killed. 
(42) Dissolved one-sixth of an ounce of arsenic in 2 ounces of muriatic acid. Took 
it ounces of this solution and one-sixth of an ounce of pure zine in small pieces. 
Confined it twenty minutes. No leaves and only a few Iceryz were killed. 
(48) Added half an ounce of nitric acid to the remnant of the arsenic solution of 
the preceding experiment, and added this to half an ounce of pure zinc. Confined 
it twenty minutes. Nine-tenths of the leaves and forty-nine fiftieths of the Iceraye 
were killed. 
(44) Took 1 ounce, by weight, of mercury and 1 fluid ounce of nitric acid. Con- 
finedit twenty minutes. One-fourth of the leaves butonly a few of the Icerye 
were killed. 
(45) Dissolved one-sixth of an ounce of arsenic in 2 ounces of muriatic acid, 
and added half an ounce of nitric acid. Took 1 ounce of this solution and one- 
sixth of an ounce of zinc. Confined it twenty minutes. No jeaves and only a 
few Iceryze were killed. 
(46) To residue of above was added three-fourths of an ounce quicklime. Con- 
fined it twenty minutes. A few leaves at the top of the tree were killed; about 
twenty-nine-thirtieths of the Iceryee on upper three-fourths of the tree and two- 
thirds of those on the lower fourth were killed. 
(47) Took half an ounce of the arsenic solution of experiment 45 and one-twelfth 
of an ounce of pure zine. Confinedittwenty minutes. Leaves uninjured; one-third 
of the Iceryz were killed. 
(48) Added one-fourth of an ounce of nitric acid to three-fourths of an ounce of 
the arsenic solution of experiment 45, and added this to one-sixth of an ounce of 
pure copper in small pieces. Confined it twenty minutes. Leaves uninjured; one- 
third of the lceryee were killed. 
(49) Took 2 ounces of mercury and 1 ounce of nitric acid. Confined it twenty 
minutes. All of the leaves and about one-third of the Icerya were killed. 
(50) To residue of above was added three-fourths of an ounce of quicklime. Con- 
fined it twenty minutes. A few leaves at top of tree and about two-thirds of the 
Iceryze were killed. - - 
(51) Took 1 ounce of mercury and three-fourths of an ounce of nitric acid. Con- 
oe it twenty minutes. One-half of the leaves and one-third of the Iceryze were 
<illed. 
(52) Diluted one-fourth of an ounce, by weight, of bromine with 1} fiuid ounces of 
water, and added this to 2 pieces of phosphorus, each as large as 2.coppercent. Con- 
fined it twenty minutes. All of the leaves and one-third of the Iceryz were killed. 
(53) To residue of above was added three-fourths of an ounce of quicklime. Con- 
fined it twenty minutes. Leaves uninjured; one-fifth of the Iceryz were killed. 
(54) Dilated one-eighth of an ounce of bromine with 14 ounces of water, and added 
this to a piece of phosphorus the size of acopper cent. Confined it twenty minutes. 
All of the leaves and one-fifth of the Iceryz2 were killed. ; 
(55) Dissolved one-third of an ounce of arsenic im 4 ounces of muriatic acid. 
* Added 2 ounces of this solution to half an ounce of quicklime and one-sixth of an 
ounce of pure zinc in small pieces. Confined it twenty minutes. Liquid part of 
residue limpid, and upon this floated a dark-brown, ointment-like substance. One- 
third of the leaves were killed; found only one living Iceryx. 
