178 



SPRAYING APPARATUS 



hand, a barrel pump ■will be satisfactory^ for a goodly number of 

 trees and if the owner of the large orchard gets enough outfits 

 he can handle any size of orchard with them. 



The following are some of the important points in a good barrel 

 pump. 



1. It ought to be mounted on the side. It is singular how few 

 pumps are mounted this w^ay, because there seem to be good 

 practical reasons for preferring it to the end-mounted pump and 



Fig. 79. — A barrel spray outfit with two extra barrels of water; a device that will save 

 much time where the water supply is far from the orchard. 



no reasons or none of importance for the other plan. The ad- 

 vantages of the side-mount are: (1) That it brings the pump 

 itself lower, thus reducing the danger of catching on trees; (2) 

 that it brings the center of gravity of the whole outfit lower, 

 thus reducing the danger of tipping over (Fig. 79) ; and (3) 

 that the sediment in the spray mixtures (and there is usually 

 more or less of this) naturally works down under the pump and 

 is drawn out instead of collecting about the comers as it does 

 in the end-mounted pump. 



