SPRAYING AND DUSTING APPARATUS 



5. There should be a good mechanical agitator of the paddle 

 type, preferably arranged so that it can be worked with the 

 pump handle without operating the pump. An agitator is 

 essential to keeping the mixture in suspension. Agitators of the^ 

 so-called " jet-type," in which a stream from the bottom of the 



FIG. 33. An undesirable type of 

 barrel sprayer now off the 

 market; the air-chamber and 

 other parts above the barrel 

 render it top-heavy, and may 

 be easily broken. 



FIG. 34. A desirable type of barrel 

 pump embodying most of the 

 features described. (Morrill & 

 Morley.) 



cylinder is supposed to agitate the liquid, are unsatisfactory 

 and allow a loss of pressure without sufficiently agitating the 

 liquid. 



6. The pump should be so attached to the barrel that it can 

 be quickly removed for repairs. Those pumps which have lugs 

 for attaching the pump plate to the barrel are much better than 

 those with screws. 



