FORMULA: 205 
Arsenite of Lime. 
Arsenic, 1 pound; stone lime, 4 pounds; 
water, 4 gallons. Boil half an hour then dilute 
to 200 gallons with water. 
Paris Green. 
Paris green, 0.5 pound; lime, 1.5 pounds; 
water, 50 gallons, or perhaps better: Paris 
green, 1 pound; quick lime, 3 pounds; water, 
250 gallons. 
Combined Bordeaux Mixture and Paris Green 
or Arsenate of Lead. 
Add to the regular 50 gallon Bordeaux, 
1 pound of Paris green stirred up thoroughly 
in a gallon of water, and stir thoroughly after- 
wards. If arsenate of lead is used, double the 
amount may be added in the same way. 
Boiled Lime-Sul phur. 
Lime, 25 pounds; sulphur, 17.5 pounds; 
water, 50 gallons. Boil 1 hour. Apply at once. 
Self-Boiled Lime-Sulphur (Scott's method). 
Sulphur, 10 pounds; stone lime, 15 pounds; 
water, 50 gallons. Put the lime into a barrel 
and pour over it 2 to 3 gallons of boiling hot 
water, add the sulphur at once, then 2 or 3 
additional gallons of the hot water. Stir 
frequently. More water may be added if it 
becomes too thick, but add as little as possible. 
The cooking should take place in about 6 to 8 
gallons of water. The mouth of the barrel 
should be covered to retain the heat. When 
slaked add the remainder of the water, 7. e., 
cool quickly. Strain. Apply at once. 
Lime-Salt-Sulphur. 
Best stone lime, 30 pounds; sulphur, 15 
pounds; salt,.10 pounds; water, 50 gallons. 
Slake the lime in hot water, then while hot add 
_the sulphur and enough water to make a thin 
paste and boil for three-fourths hour, stirring 
thoroughly, adding more water as it evaporates. 
Then add the salt, boil an additional 15 minutes, 
dilute with hot water, filter and spray hot. 
Warren gives the following method of prepa- 
ration: Fresh lime, 15 pounds; flowers of 
sulphur, 15 pounds; salt, 15 pounds; water, 
45 gallons. Bring 4 or 5 gallons of water to a 
boil in an iron kettle, mix the sulphur with hot 
water, crushing the lumps, then put into the 
boiler, add the lime in 4 separate parts, adding 
cold water gradually to subdue the violent 
boiling and prevent from overflowing. Finally 
add the salt, boil 1 hour or more, stirring 
frequently. Strain, dilute with the remainder 
of the 45 gallons (about two-thirds) and spray. 
There are other formule in which the pro- 
portions vary somewhat. 
Potassium Sulphide. 
One pound to 50 gallons of water. To be 
used at once, because it soon loses strength. 
Carbon Bisulphide. 
Use 1 pound to each 100 bushels of grain, 
or 1 teaspoonful to each cubic foot of space. 
Mercuric Chloride. 
Solution of 1 part to 1000 parts of water. 
To be used in glass or wooden vessels, never 
in metal ones. For field use tablets may now 
be purchased so that it is only necessary to 
dissolve the requisite number in a given volume 
of water. 
Seed corn may be exposed 20 minutes with 
entire safety, wetting first in alcohol for a 
minute or two. Unsprouted potatoes 40 min- 
utes to 1 hour. 
Hydrocyanic Acid Gas. 
For treating dormant nursery stock, W. E. 
Britton, recommends 1 ounce cyanide of potash, 
2 ounces sulphuric acid and 4 ounces of water 
for each 100 cubic feet of space. The acid is 
poured into the water, never the reverse, on 
account of over heating and danger of steam 
explosions; the cyanide is added, and the room 
shut up tight for halfan hour. For greenhouse 
fumigation Woods and Dorsett recommended 
20 minutes’ exposure using 0.075 gram to 0.15 
gram cyanide of potash per cubic foot, depend- 
ing on the kind of plants, ferns being very 
sensitive, and violets rather resistant. Symons 
has shown that dormant peach buds will endure 
0.50 gram of potassium cyanide per cubic foot 
(2 ounces per 100 cubic feet) for 60 minutes. 
Apples will endure as much. The use of 0.30 
gram per cubic foot for 30 minutes is scarcely 
sufficient to kill all of the San José scale, but 
0.30 gram for 45 minutes would be. 
Formalin (40 per cent Formaldehyde). 
I pint to 50 gallons of water for smut of 
wheat and oats; 
2 pints to 50 gallons for scab of potato; 
4 pints to 50 gallons for disinfection of soils. 
The formalin should be taken from sealed 
(fresh) bottles, as it loses strength readily. 
Hydrogen Peroxide. 
Use 1 part to 200 of water. Must be fresh. 
Whale Oil Soap. 
This may be used for plant lice at the rate of 
2 pounds per 12 gallons of water. Dissolve 
in hot water. In greater concentration it 
should be tried in advance on a few plants. 
In proportion of 1 pound to 4 gallons of water 
it is said to injure tender plants (J. B. Smith). 
