84 



N. 11. AGR. EXPERIMENT STATION 



[Bulletin 143 



can be used for spi-aj'ing potatoes or any other crop. Numer- 

 ous requests come to us to recommend some particular pump. 

 In repl}' we are accustomed to refer to the best pump companies 

 and advise the inquirer to study their catalogs and then use his 

 best judgment, after a careful consideration of the following 

 points : 



1. The pump should be guaranteed to furnish four nozzles at 

 80 to 100 pounds pressure with ordinary pumping. 



2. It should have a good air chamber within the barrel, and 

 not projecting above it as in some styles. 



Fig. 15.— a gasoline power outfit well adai)ted for orchard use. 



3. As few of the working parts of the pump as possible should 

 be above the head of the barrel, as exposed parts are easily 

 broken. 



4. Pumps wIkisc liandles and other parts are made of gal- 

 vanized or malleable iron are preferable to castings, which break 

 easily. 



5. The .cylinder, i>lunger, valves and working parts should be 

 of brass. 



