Nc. 6. DEPARTMENT OF AGRICULTURE. 9VJ 



attached to keep the mixture well stirred in the barrel, and it should 

 not be expected that the same nozzle will do first class work with 

 every spraying mixture given. Some nozzles are especially adapted 

 to one kind of si)ray, and others to other spraj's. Above all, an intel- 

 ligent knowledge of what is causing the injury, and exactly how and 

 when to take the proper steps to control i(, should be one of the 

 ingredients added to every formula here given. 



61 



