19 



With the rectangular or half-round tank an ordinary barrel pump can be used, but 

 it is much better to use one of the larger tank pumps especially made for the pur- 

 pose (fig. 7). This can be mounted either on top of 

 the tank or on a platform at either end. The regu- 

 lar tank pump has a suction of whatever length is 

 desired, which draws the spraying mixture from the 

 tank. One of the great advantages of the tank-pump 

 outfit is the convenience of arranging an elevated plat- 

 form. Where tall trees are to be sprayed it is almost 

 impossible to reach the tops from the ground with 

 extension rods of reasonable length. A scaffolding or 

 tower of the height desired can be built on top of the 

 wagon, and the operator can thus be elevated 10 or 12 

 feet from the ground. A type of the tank -pump oiitfit 

 is shown in the accompanying illustration (fig. 8). 



Geared sprayers. — In the above-described outfits 

 the pressure on the i)ump is secured by man power. 

 Ingenious fruit growers, as well as manufacturers, 

 have devised several contrivances by which power is 

 obtained by means of a sprocket wheel from the axle 

 of the wagon. There are a number of different de- 

 vices, several of which are more or less successful. As 

 a rule these geared devices are better adapted to low- 

 growing crops, like potatoes and strawberries, and 

 possibly also to vineyards, than they are to large 

 orchard operations, although they have been used a 

 good deal in orchards. In spraying fruit ti'ees the 

 operator frequently stops long enough to coat each tree 

 thoroughly before proceeding. Usually this can not 

 be done with the geared sprayers, although some have 

 provision for storing up the pressure. ^'«' ^-Large hand spray pump. 



Steam and gasoline outfits. — The highest type of spraying outfit consists of a 

 steam, gasoline, or kerosene pump mounted on a wagon and drawing the liquid 



from a tank holding 100 

 to 300 gallons. Several 

 growers use very suc- 

 cessfully a small 2 or 

 3 horsep )wer steam 

 boiler and a bronze 

 steam pump. This is 

 carried on a platform 

 on the wagon. The 

 only objection to such 

 an outfit is its weight, 

 but, on the other hand,"" 

 those who have used 

 steam sprayers seem to 

 have less fault to find 

 than the users of the 

 gasoline sprayers. 

 Recently the writer has used a very successful kerosene outfit very similar to 

 the one described above. With a gasoline or steam outfit it usually pays to 

 have four leads of hose and four men spraying at a time. 



247 



Fig. 8.— Tank outfit with haud pump. 



