Points of a Spraying Outfit 335 



Pump, etc. — 



Slippage (rated capacity less actual delivery). 



Uniformity of pressure. 



Efl5ciency of pressiire regulator in maintaining uniform 



pressure when hose is cut off or is on. 

 Drop in pressure between pump and nozzle. 

 Amount of overflow from pump to tank when working at 

 normal capacity. 

 Outfit- 

 Efficiency of agitator. 

 Time required for refiUing tank. 

 Ratio of weight to capacity. 

 Accessibility and convenience. 

 Accessibilty of working parts — 



Valves: Ease of replacing valve-seats. 

 Drains: Engine, pump and tank. 



Plunger-cups or packing; repacking stuffing-boxes (if any). 

 Screws; bolts; oil-cups; pressure-regulator. 

 Method of taking in slack between pump and engine. 

 Cleaning strainer on suction hose; cleaning tank of debris. 

 Adaptability to field conditions — 

 Cramping of wheels in turning. 

 Radius of circle required in turning. 

 Possibifity of miring in irrigation ditches or loose soil. 

 Draft. 

 Repairs — 



Possibility of securing duplicate parts. 

 Ease of making repairs. 

 Construction. 

 Engine — 



Genera] construction: 



Durability; simplicity of design. 

 Exposure of working parts: 



Freedom from danger of breaking cogs, cranks, etc. 

 Freedom from danger on part of operator. 

 Proportions of working parts; quahty of materials; 

 workmanship. 

 Provision for drainage. 

 Method of feeding gasolene. 



