192 



The Spraying of Plants. 



Merrill & Morley, Bentou Harbor, Mich., in 189i introduced a 

 pump shown in Fig. 12. This style is a radical departure from 

 older forms. The cylinder is placed at the bottom of the pump, 

 directly in the liquid. No stuffing-box is used, and as the pis- 

 ton and cylinder are surrounded by the fluid, no priming is 

 - __ B _ Mjji _ im necessary. These pumps are sim- 



ple, powerful, and durable, and 

 many are now in use. 



In recent years many of the 

 leading pump manufacturers have 

 added spray pumps to their cata- 

 logues, and other firms have been 

 established which make a specialty 

 of this class. As so many differ- 

 ent -men have been engaged in 

 the work, it is not strange that a 

 great variety of pumps should 

 have been made. Some of them 

 are excellent, but others do not 

 answer all requirements so well as 

 might be desired. One form that 

 has been little used and which yet 

 has -some very promising features 

 is that made by the Bean-Cham- 

 be rlin Manufacturing Co., of Hud- 

 son, Mich. The firm offers a 

 number of pneumatic pumps which 

 differ radically from the pumps 

 sold by other dealers. Instead of 

 using directly the force obtained 

 by the moving piston, this force is 

 directed toward compressing air 

 in a reservoir. Fig. 13 illustrates the general plan upon which 

 these pumps are built. 



The pump proper, B, is situated at the right of the large tank 

 or reservoir. It is used for forcing liquids into the reservoir, ( ', 

 from below. As the liquid enters the tank the air is compressed, 

 and this allows a large amount of fluid to enter. Most of these 

 pumps are made so that they will withstand 160 pounds of 

 pressure, a steam gauge, G, being fastened to the tank of each 



FIG. 12. A new type of spray 

 pump. 



