THE MONTHLY BULLETIN. 



313 



Pressure. — With a good pnmp there will be little dittieulty about 

 maintaining sufficient pressure which is a very great consideration in 

 obtaining good work. For general spraying the pressure should not 

 fall below 150 pounds, while 200 pounds to the square inch is not too 

 nuich. Such pressure enables the operator to reach every part of the 

 tree or foliage in a very sliort time. 



Nozzles. — There are at present'many more types of nozzles than any 



Fig. 303. — A geared sprayer which is excellent for spraying garden 

 and truck crops. This machine costs $82.50. 



one man can ever hope tt) test the merits of. And as a matter of fact 

 some of the present types are adequate for all kinds of spraying work. 

 The large type (Fig. 305 b and c), known as the "Jumbo," "Whirl- 

 pool," "Misty Jr." and "Friend" will meet the needs of almost any 

 work by simply changing the disc and thus enlarging or reducing the 

 size of the hole. For the application of very fine sprays for small 

 animals like red spiders and mites the cyclone type as shown in Fig. 

 305a is verv good. 



