43^ agriculture; of maine;. 



spraying apparatus. 



Pumps: Regardless of the style or size of the pump all 

 working parts which come in contact with the liquid should be 

 of brass or bronze. To do good spraying it is necessary to 

 have high pressure, loo pounds or more per square inch, hence 

 it is essential to have a pump of sufficient capacity to do the 

 required amount of work with ease. 



Barrel pumps: For small orchards, and particularly where 

 general farming is carried on, the barrel pump worked by hand 

 is probably the most satisfactory. It may be mounted on a 

 two-wheeled cart and with slight alterations in hose connec- 

 tions may be used for spraying potatoes and other field and 

 garden crops. The pump should have a large air chamber to 

 maintain a constant, steady pressure. Good barrel outfits com- 

 plete for orchard spraying may be obtained for from $20 to 

 $30 or even less. For larger spraying operations where it is 

 desired to avoid the expense of power machines a large size, 

 double action, two cylinder hand pump may be obtained at 

 somewhat greater expense. These are operated by either one 

 or two men and are usually mounted on a four-wheeled wagon 

 with a 150 or 200 gallon tank. 



Geared or traction sprayers: Sprayers with the pump actu- 

 ated by a gear attached to the axle or by chain gear from the 

 wheel of the cart as the apparatus is drawn along are quite 

 generally' and successfully used on Maine potato fields. Cer- 

 tain makes of this type of machine are equipped with an orchard 

 spraying attachment. They are not recommended as practi- 

 cable for orchard work, particularly on large trees, on account 

 of the tendency for the pressure to run down when in use and 

 not in motion. 



Gasolene sprayers: For the large orchardist where some 

 thousands of trees must be sprayed in a very short time some 

 form of power sprayer capable of furnishing two or four leads 

 of hose with constant high pressure is absolutely essential. 

 They are economical in time, labor and material. While each 

 style of power sprayer has certain advantages, the gasolene type 

 with the engine, pump, and tank mounted on a frame on low 

 wheels is most generally used where the land is not too rough. 

 Improvements in engine construction have removed many of 

 the former objections to this type of machine. Both air and 



