SPRAVIXG MACHINERY 12/ 



of these three conditions is absent, however, as when 

 trees are large, the ground rough, or very careful work 

 is necessary, some other form of power is better. 



Engine Poiver Sprayers — Steam engines have occa- 

 sionally been used in spraying. As a rule they are not 

 to be recommended. Still occasionally there is a farm 

 on which a small steam engine is already owned, and 

 where the men know how to manage it. Where the 

 land is reasonably smooth, and a fairly light mount 

 can be secured, the steam engine may prove satisfac- 

 tory. 



Gasoline motors come more nearly meeting the spe- 

 cial requirements of the apple grower who wants to 

 spray his trees. There are several manufacturers who 

 are putting such outfits on the market. Each machine 

 consists of a gasoline motor, of about two to three 

 horse power, more or less conveniently mounted on a 

 truck with a two-hundred gallon tank. The gasoline 

 engine or motor is comparatively simple and easy of 

 management, so that a really intelligent farm hand can 

 usually make friends with it. It may as well be ac- 

 cepted at the beginning of things that an ignorant and 

 heedless hired man cannot manage a spray outfit. 

 The gasoline motor has one practical advantage which 

 strongly commends it to many farmers ; viz., it can be 

 used for many other purposes when the spraying is 

 not going on. It will saw wood, cut silage, pump 

 water or run the milking machine. 



Compressed Air Sprayers — In this form of machine 

 two air-tight metal cylinders or tanks are mounted side 

 by side on the truck. One of these cylinders holds the 

 spray liquid ; the other is charged with compressed air. 

 In order to charge this cylinder some stationary form 

 of power is required, as a horse power, water power. 



