32 



STATE BOAKD OF AGRICULTURE. 



Fig. 3. — Deming Knapsack Emulsion Sprayer. 



Fig. 4. — Deming Emulsion Sprayer. 



It is not intended to advertise any maker of pumps here, for there 

 are a considerable number who do almost equally good work ; hence 

 no addresses are given, and figures are introduced only to illustrate 

 types of machines. 



Where scale insects or plant lice are to be dealt with, it would be 

 well to get an emulsion pump with which kerosene and water may 

 be sprayed in a mechanical mixture. Such pumps are now made by 

 several makers and usually so that the kerosene attachment may be 

 removed and the machine used for ordinary spray-work. 



When you have a good machine keep it in order, and never let it 

 stand full of a mixture containing lime or a sediment of any kind. 

 The reason for this is obvious enough, and it should not even need 

 the suggestion ; but I am afraid it does. The hose should also be 

 cleaned each time, and it may all be done very easily by pumping 

 clean water through the apparatus for a few minutes. 



The next important item is the nozzle, and for making a hue spray 

 nothing equals the vermorel. With a knapsack machine a single 

 nozzle at the end of a three-foot lance or pipe is ample ; in orchard 

 work where a greater volume of spray is desirable a group of three 

 such nozzles at the end of an 8 or io-foot gas-pipe will be found very 

 satisfactory. Sometimes a fiat spray is needed, sent to a greater 

 distance than is attainable with a vermorel, and in such cases a 

 McGowen or Deming Bordeaux are useful. But this is another case 

 where almost each maker has some special outfit, and most are good ; 





