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with mixtures containing copper salts, and other insecticides, has 

 ]ed to the more general use of specially designed pumps that 



Barrow Spray Puinp. 



distribute the liquid with greater rapidity and under the form of 

 minute globules in a fine spray. 



Garden Syringe the simplest Spray Pump. 



How it should be made and points to consider. An authority 

 on the matter thus expresses himself: Price and weight must be 

 considered. A cheap pump, that will handle clogging and corrosive 

 mixtures all the time, and be simple enough to stand the rough 

 using of farm and orchard hands, who know little more about 

 spraying than to work the pump handle, is not very easy to get. 

 All parts of component spray pumps must be of the very best and 

 suitable description hose, nozzle, means of controlling the supply 

 from pumps, elevating the nozzle, etc. 



Iron is unfit material for spraying pumps, sulphate of copper 

 destroying the nice adjustment of the working parts. So far, brass 

 has given most satisfaction, and all working parts and all valves in 

 contact with the spraying material should be of that or other non- 

 corrosive material. Soft brass, composed of copper and zinc, should be 

 avoided, as it is corroded by ammonia. Leather valves soon become 

 hard and unyielding. All parts should be strong and easily 

 reached for repairs, replacement, or cleaning. 



As nearly as possible, all power expended ought to be applied 

 in forcing the material, in hand work especially. Some pumps, 

 intended to be mounted on a barrel, are so constructed as to make 

 the whole apparatus top-heavy and liable to accidents. It often 



