CHAPTER VIII. 

 SPRAY MACHINERY AND SPRAY MATERIALS. 



SPRAY MACHINERY. 



The most improved spray machinery is necessary for 

 efficient work. Without effective spraying there is seldom 

 any good that ever results from the practice. There is no 

 other operation in horticultural practices that calls for so 

 thorough work as does the application of spray materials to 

 all plants. It has been found that the most effective work 

 can be done with those machines which permit of high pres- 

 sure. This does not mean that the small hand sprayers are 

 not valuable, but where the orchard or garden is large enough 

 to warrant the purchase of a large machine better spraying 

 can be accomplished. 



Kinds of Sprayers. — There are six distinct types of sprayers 

 on the market. Each type is made primarily for certain 

 kinds of spraying. The capacity of each one varies, and the 

 efficiency of the several types depends to a large extent upon 

 the size of the sprayer. The six types are : (1) the hand atom- 

 izer, (2) the bucket sprayer, (3) the automatic compressed- 

 air sprayer, (4) the barrel sprayer, (5) the twin-cylinder hand 

 sprayer, (6) the power sprayer, of which there are three sizes, 

 namely, the pony outfit, the medium-sized sprayer, and the 

 large sprayer. 



Hand Atomizer. — The hand atomizer is the most simple 

 kind of a sprayer. It consists of a small can or glass jar 

 attached to a tube into which fits a piston. The piston is 

 attached to a handle and by working it back and forth the 

 spray material is forced out on the plant. This sprayer is too 

 small to be of much value only on small plants. 



Bucket Sprayer. — The bucket sprayer is the next larger size 

 and does better work.. This sprayer consists of a small 



