96 



SPRAY APPARATUS 



Traction Outfits 



Traction sprayers derive their power from the wheels of the vehicle 

 on which the pump and tank are mounted. They are especially useful 

 in spraying grapes, potatoes, or other field crops ; in other words, they 

 are adapted to the kind of work in which one desires a continuous spray 



delivered constantly 

 at a definite position 

 or angle. For spray- 

 ing of this character 

 they may properly be 

 selected. For general 

 orchard work they 

 are not suited unless 

 there is some ar- 

 rangement by which 

 the gearing may be 

 disconnected and the 

 pump operated by 

 hand when desired. 

 Outfits of this kind 

 should always be pro- 

 vided with a large 

 air chamber, a pres- 

 sure gauge in plain 

 sight, and a relief 

 valve which will open 

 at a certain pressure and allow the fiquid to flow back into the tank. 

 The capacity of traction sprayers is figured on the basis of a vehicle 

 moving at the rate of 250 feet a minute, and ranges from 5 to 18 

 gallons of liquid per minute. The connection to wheels is made by 

 eccentric, chain, or gearing. 



Hand traction sprayers operate on the same principle, but are much 

 smaller, are intended to be wheeled about by hand, have a tank of 

 about 20 gallons capacity, and are so arranged that the pump may be 

 thrown out of gear and operated in the same fashion as a barrel pump. 



Fig. G2. — A horizontal pump. Original. 



