138 Control of Parasites 
‘ a To have the spraying properly and 
thoroughly done is not always easy, 
especially with large trees and incom- 
plete apparatus. 
For private grounds of limited extent 
a fifty-gallon cask or tank with a 
strong, double-acting force pump’ (the 
Fic. s1.—Triple spray working parts of brass and the valves 
“Vermoral” nozzle also of metal), having an air cylinder 
of one and a half inches or more, and a stroke of five inches 
or more, attached to the top or 
side of the barrel, mounted on 
a cart, with fifty to one hundred 
feet of half-inch white cotton or 
rubber hose, ladders and lifting 
poles of bamboo or quarter- 
inch gas pipe, will answer well 
enough for apparatus. The 
entire outfit, exclusive of the 
cart, costs between $30 and $40, 
the pump alone costing from fr em olll «@ 
$10 to $15. A barrel pump, A i es 
satisfactory for general work on ey , ur 
small places, can be had for 
$r5, and a bucket pump, which 
can be used with an ordinary 
pail or bucket, good to spray 
bushes and small trees, may ,.. <2. — Bucket pump with 
be had for from $3 to $y, tank for oul. 
including rubber hose and nozzle. 
The most important feature in the apparatus is the nozzle, 
i Knapsack pumps, of which there are several makes in the market, 
are, aS a rule, not practical for tree work. 
