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the irritation caused by the poisonous hairs may be obtained by 

 bathing the affected parts with cooling lotions, or by the use of vase- 

 line. For fuller information apply to the Gypsy Moth Commission, 

 6 Beacon St., Boston. 



MAKING AND APPLYING INSECTICIDES 



ARSENATE OF LEAD. 



Arsenate of soda (50*^ strength), 4 ounces. 

 Acetate of lead, 11 ounces. 

 Water, 100 gallons. 



Put the arsenate of soda in two quarts of water in a wooden pail, 

 and the acetate of .lead in four quarts of water in another wooden 

 pail. When both are dissolved, mix with the rest of the water. 

 Warm water in the pails will hasten the process. For the elm-leaf 

 beetle use 10 instead of 100 gallons of water. For most shade trees 

 50 gallons of water is better than 100 gallons. 



A number of ready-made arsenates of lead are now on the market, 

 and except when very large amounts are needed it will probably 

 prove cheaper to buy the prepared material than to make it. With 

 this ready-made material, take one pound to fifty gallons of water in 

 general, but five pounds to fifty gallons for the elm-leaf beetle. 



KEROSENE EMULSION. 



Hard soap, shaved fine, one-half pound. 

 Soft water, i gallon. 

 Kerosene, 2 gallons. 



Dissolve the soap in the water, which should be boiling; remove 

 from the fire and pour it into the kerosene while hot. Churn this 

 with a spray pump until it changes to a creamy, then to a soft butter- 

 like mass. Keep this stock, using one part in nine of water for soft 

 bodied insects such as plant lice, or stronger in certain cases. If 

 the water be hard add borax or soda to soften it before dissolving 

 the soap. 



