62 INSECT PESTS OF FARM, GARDEN AND ORCHARD 



crops as tomatoes, melons, etc., which cover the ground, so that 



it is difficult to drive through them without injuring the vines, 



crops growing on steep hillsides, or for a small acreage of any 



garden crops, small fruits, or small 



trees. The main objections to 



them arc that they are heavy to 



carry, thus limiting their use to a 



small area; they frequently slop 



over, and wet the carrier's back; 



and the pumps do not develop 



sufficient pressure for some kinds 



of work. Consequently they are 



not as much used as formerly, but 



are useful for the purposes indi- 



FIG. 28. Bucket pump mounted in 

 bucket, and mounted in tank with 

 agitator. (Courtesy Deming Co.) 



FIG. 29. Bucket pump with 

 large air-chamber, which will 

 maintain a good pressure. 

 (Courtesy F. E. Myers & Bro.) 



cated, and inasmuch as they may also be used as a simple 

 bucket pump, they are to be preferred to them. The cost varies 

 from $8 to $12 or $15. 



Compressed-air Sprayers. In recent years the compressed- 

 air sprayer has come into favor for use in small gardens. It 

 consists of a brass tank which is filled with the liquid; the air 



