SPKAYINd MACTIINERY 41 



The chief types of pumps are briefly mentioned below. 



Bucket pumps. — These pumps are suited for use in 

 the garden ; to spray the bushes or a few small fruit trees 

 in the yard. The fact that they may be used in any ordi- 

 nary bucket or pail gives them an advantage over some 

 of the other outfits. By the attachment of a foot rest which 

 extends outside the pail to the ground, the pump can be 

 held firmly. They cost from $3 to $7 complete, including 

 rubber hose and nozzle. 



Compressed air sprayer. — After the tank is partly filled 

 with the spray mixture and closed, air is pumped in, thus 

 pressure is exerted upon the liquid, which is forced out in 

 the form of a fine spray when the nozzle is opened. 



This type of sprayer is satisfactory in some instances, 

 and is adapted to about the same fields as the bucket pump. 

 It is not well adapted for spraying large areas, since the 

 sprayers are inconvenient to carry, are slow, and heavy. 

 They cost from $3 to $7. 



Knapsack sprayers. — These consist of 3 to 5 gallon 

 tanks, with straps so attached that the outfit can be carried 

 upon the back in the manner of a knapsack. The handle 

 is so adjusted that it is operated in front of the carrier. 

 These pumps are best adapted to spraying crops which 

 grow breast high, as grapes. They may also be used in 

 spraying small trees. For general garden use, or small 

 areas, a half acre to an acre, they are to be recommended. 

 Complete with hose and nozzle, these pumps cost from 

 $10 to $20. 



Barrel pump. — For ordinary orchard work the barrel 

 sprayer is of most importance. The pump is adjusted to 

 a barrel, at either the side or end, preferably the side. It 



