Tent Caterpillars. 



i97 



Arsenate of Lead is prepared as follows: — Dissolve 1 oz. of 

 arsenate of soda in warm water, and add to 16 gallons of 

 soft water. Then dissolve 3 oz. of acetate of lead in water, 

 and pour into the 16 gallons of liquid. Add to this 2 lbs. of 

 treacle. In the place of treacle the arsenate of lead wash 

 may be mixed with paraffin emulsion, and so a double insecti- 

 cide prepared. This wash when properly mixed is most 

 successful, and never burns the leafage as growers often find 

 to be the case with Paris green. 



In all cases proper sprayers must be used with fine nozzles, 

 so that a dense mist of the wash may be thrown on the 

 trees. 



