136 Control of Parasites 
during the early part of the season. This may, in a dry 
season, be effected by spraying a second time after two 
weeks, but if the season is rainy as many as three or four 
applications may be needed before the first of July. 
Tie 
| ; 
A ppeangay iit 
Fic. 48 — Barrel pump for spraying. 
Arsenate of Lead mixture: Dissolve eleven to twelve 
ounces of acetate of lead (sugar of lead), costing twelve to 
fifteen cents per pound, in four quarts of hot water in a 
wooden pail, and four ounces of arsenate of soda (96 per 
cent. pure), twelve to fifteen cents per pound, in two quarts 
of water. For use, dilute at the rate of four to six pounds 
in a hundred gallons of water, the larger quantity for elm- 
