220 



The Spraying of Plants. 



Many orchards are so thickly planted that an apparatus like 

 the above can be driven through only with great difficulty. In 

 such cases the branches should be cut so that the orchard may 

 be penetrated in at least one direction. With good apparatus 

 the trees may then be thoroughly treated. 



Later improvements in spraying machinery are the power 

 sprayers, of which Fig. 34 represents one of the best. The 



FIG. 33. A good rig for spraying orchards. 



illustration is so detailed that little need be said regarding the 

 construction of the machine. The pumps are worked by means 

 of a bar which is fastened to a crank. The crank is attached 

 to wheels that connect with the large wheels by means of 

 sprocket chains, and motion is obtained in this manner. Fig. 

 35 represents another type of machine of this class. The liquid 

 is applied by means of a rotary pump. Power machines are 

 excellent for spraying all low-growing plants or small trees, but 



