SPRAYING AND SPRAYING APPARATUS. 131 



Fig. 62. Spray pump with hori- 

 zontal movement. 



QUESTIONS Chapter VIII. 

 Spraying and Spraying Apparatus. 



1. What are the advantages and disadvantages of dust spraying? 



2. What are the important things to be remembered for success- 

 ful liquid spraying? 



3. By what means can the spraying mixture be kept well mixed 

 in the barrel spraying outfits? In the tank spraying outfits? 



4. What materials should be used for making the working parts 

 of spray pumps? 



5. What causes the clogging of the nozzles and how may it be 

 remedied? 



6. What care should be taken in spraying the orchard? 



7. What spraying outfits are best adapted to small areas? To 

 large areas? 



