WHOLESALE PRICE LIST 
2 ? 
Directions for Fumigating Nursery Stock With 
Hydrocyanic Acid Gas. 
The necessary equipment consists of an air tight chamber (box or house) a glazed 
earthenware vessel, a glass measure graduated to ounces (a plain tumbler, mark 
the sides with a file) and a set of accurate scales. The necessary chemicals are 
Cyanide of Potash (98 percent.) and Sulphuric Acid (specific gravity 1.8;).) Care 
should be taken to secure the 98 per cent. Cyanide otherwise an insufficient 
amount of gas would be generated and the fumigation prove ineffective ( 'Com- 
mercial” Cyanide contains an average of 26.45 per cent. Cyanide of Potash ) 
Cyanide of Potash must be kept in an air tight package and so packed 
will keep indefinitely, it is a deadly poison and should not be left where it will 
fall into the hands of children or careless persons and should never be handled by 
a person having open sores, cuts or bruises upon his hands. The gas is colorless 
and if inhaled in quantity is fatal, smaller amounts induce headache or dizziness. 
The best commercial grade of Sulphuric Acid should be procured. This acid 
should be kept in a glass or earthenware vessel tightly stopped with a glass or 
lead stopper. 
The chief requisite for a fumigation house is that it should be air tight or gas 
proof. 6 
The standard formula for fumigating each 100 cubic feet of space contained in 
the fumigating house is as follows: 
l oz. Cyanide of Potash (98 per cent.) 2 fluid oz. Sulphuric Acid. 4 fluid oz of 
Water. 
The glazed earthenware vessel should be somewhat larger than is necessary to 
hold the chemicals, a one or two gallon jar is perhaps the best container. 
The trees, as dug and brought from the field should be placed in the fumigating 
house, care being taken to see that they are free from anv considerable quantities 
of mud or dirt, the trees should not be fumigated when they are wet as it has been 
shown that in this condition they are likely to be injured bv the gas. When the 
compartment is full of stock, close all openings except the floor, place the jar on 
the floor near the middle of the room, pour in the required amount of water and 
then slowly pour in the acid. The Cyanide previously weighed and enclosed in a 
tight paper bag is now dropped into the jar and the operator leaves immediately 
and closes the door tight. The steps in this operation should nevkk be varied 
If water is poured into the acid a violent action takes place and may be the cause 
of injury to the operator. Enclosing the Cyanide in a paper bag makes it conven- 
ient and safe to handle and retards the generation of the gas for a moment after 
being dropped, thus allowing time to leave the room and close the door securely. 
Keep the room closed for forty minutes, at the end of which time the door and 
window should be thrown open, care being taken to avoid the outward rush of 
gas. After fifteen minutes of airing the room may be safely entered and the stock 
removed, being now ready for packing or heeling in. After fumigating the con- 
tents of the jar should be buried. 
Georgia State Board of Entomology advises Nurserymen to use Merck & Co.’s 
Cyanide when in original sealed packages. See bulletin No. 15, pages 20-23. 
Chemicals 
Cyanide of Potash. Merck it Co.’s (98 per cent.) in original sealed tin packages 
containing: 1 pound net, per pound $0.35 
Cyanide of Potash is excluded from the mails, but can be shipped by Express or 
Freight. 
Sulphartc Acid (Specific Gravity 1.83) large glass stopped bottles, securely 
packed in cases ready for shipment. * J 
1 0 pound bottle $1.00 
15 pound bottle 1 40 
Sulphuric Acid cannot be shipped by Express but can be shipped by Freight. 
Buy chemicals of your local druggist if you can secure Merck’s Cyanide in 
UNBROKEN original packages, and Sulphuric Acid that has been kept in a G I, ASS 
STOPPED bottle. 
