332 CONTROLLING INSECTS AND DISEASES 



or more, may well be equipped with %-inch hose for ground 

 work and %-inch hose on the tank. 



If the hose connections from the pump are at the rear of the 

 outfit, the hose may be attached conveniently and may easily 

 be kept out of the way of the wheels. 



13. Couplings. Hose couplings should be of brass with 

 double-length shanks in order to offer plenty of surface for 



(John Bean Mfg. Go.) 



YiG. 123. A front mounting of the tank is unusual and puts much 

 weight over the front axle which may impede turning. On a - horse- 

 drawn outfit it is easier to start the engine. 



application of the hose clamps. The channels or waterways 

 should be large and without obstruction, and the coupling 

 should offer good wrench grips on both outer (female) and 

 inner (male) sections. Short and cheap couplings give endless 

 trouble through bursting or pulling out of the hose. 



Brass hose clamps do not rust and resist chemical action. 

 They should be strong and broad so that they may be well 



