256 



THE APPLE 



best features of these pumps is that they can be worked continuously 

 ten hours a day and thus cause little waste of time. 



Many of the older types of gasoline outfits were clumsy and 

 easily put out of order. The more recent types are much lighter, 

 simpler, and more reliable, no expert mechanical skill being re- 

 quired to run them — only care. They are, however, more reliable 

 on fairly level ground than on steep or rough land. Two or three 

 leads of hose are needed with a gasoline outfit, and if the trees are 

 old, one man should stand in a tower built over the tank. Both 



air-cooled and water-cooled 

 engines are satisfactory. 



The compressed-air sprayer. 

 For some of the roughest 

 orchard lands compressed-air 

 outfits are preferable. These 

 pumps and others of similar 

 type have all the advantages 

 of the gasoline sprayer and 

 are free from some of the 

 most annoying disadvantages. 

 Some orchardists now have 

 outfits for filling compressed- 

 air tanks at home. 



One air compressor, costing 

 from $75.00 to $i 50.00, will 

 fill a number of sets of tanks, 

 so that although the first cost is large, the subsequent expense for 

 increasing the outfits is small. The compressor may be driven by 

 water power, but if this is not available, then by a gasoline engine 

 of from 6- to 12-horse power. As the engine is stationary, it is 

 not so likely to get out of order as one mounted on a spray wagon. 

 A storage tank for compressed air is used by some. The spray 

 wagon or cart contains two galvanized-iron tanks, tested to 200 

 pounds' pressure and holding from 50 to 100 gallons, one for the 

 liquid and the other for compressed air. From this, spraying pres- 

 sure of from 80 to 140 pounds can be secured. As already pointed 

 out, compressed-air outfits are especially adapted for very steep 

 and rough land. 



r*^ 



Fig. 121. Putting on the finishing touches 

 — spraying begins to-morrow 



A modern, up-to-date, practical equipment for 

 spraying 



commercial apple orchard 



