130 SPRAY MACHINERY AND SPRAY MATERIALS 



pump which usually has two small brass ball valves. The 

 pump cylinder and air chamber is usually made of brass. 

 This pump is capable of developing considerable pressure 

 and is valuable for spraying many kinds of plants. The 

 pump is separate and in order to spray it must be set into a 

 bucket containing the spray material. This is the chief 

 drawback to this sprayer, since it is awkward to carry around 

 in an open bucket filled with the spray mixture. A small 

 piece of hose and a spray nozzle is attached to this pump. 



Fig. 58. — A good hand sprayer for small truck and bush fruits. 

 (The Deming Company.) 



Automatic Sprayer. — The automatic sprayer is a more 

 convenient form than the bucket sprayer. This sprayer can 

 be filled and then pumped up with air, and the entire atten- 

 tion of the operator can be devoted to spraying. The auto- 

 matic sprayer is very convenient and easy to carry. It is 

 particularly good for truck crops and small bush fruits. 



The tank of this sprayer should be made of brass. This 

 is highly desirable, because if it is made of galvanized iron 

 it corrodes very rapidly when used for Bordeaux mixture. 

 The corroding action on the metal makes the life of the 



