79 Farmers’ Bulletin 1220. 
sufficient pressure and uniform discharge of the spray material, the 
pump should be provided with an adequate air chamber-to which a 
pressure gauge may be attached if desired. The pump may be 
mounted either on the head or side, and the whole outfit placed on 
a cart or sled or wagon. 
SPRAYING OUTFITS FOR LARGE OPERATIONS. 
‘Spraying outfits for large vineyards are generally operated by 
gasoline engines, although traction sprayers and compressed-air out- 
fits are sometimes used. 
GASOLINE POWER SPRAYERS. 
Spraying outfits operated by gasoline engines are by far the. most 
useful type of sprayer and are made in various sizes and styles to 
suit almost any require- 
ment. Special outfits have 
been designed for vine- 
yard spraying. Some have 
a series of fixed nozzles 
attached at either side at 
the rear. These may give 
satisfaction for spraying 
when the vines are young 
and all parts can be easily 
covered. After the fruit 
is set, however, it is neces- 
sary to use an outfit op- 
erated with trailers, that 
is, long leads of hose havy- 
ing the nozzles directed by 
hand, as shown in figure 
76. With a small power 
outfit a one-leader hose is 
Fass Se nnelspny cere) generally used. Two leads 
may be employed with a 
pump of sufficient capacity to keep up the necessary pressure. Large 
power sprayers are made with pumps of from two to four cylinders, 
having a capacity of 5 to 15 or more gallons per minute under a 
pressure of 150 to 300 pounds. These sprayers are equipped with 
engines of from 2 to 4 horsepower. 
The various spraying outfits now on the market differ much in 
durability and efficiency. The fruit grower, therefore, before select- 
ing an outfit should study carefully the various kinds and determine 
by observation and inquiry from users which outfit will best meet his 
requirements. 
