42 



Horse-power. — Used in connection with 



Fig. 24.— a barrel and cart spraying outfit. 



a geared sprayer, liorse- 

 power is in very 

 general use in vine- 

 3"ards. There are 

 a number of forms 

 of these spraj^ers 

 on the market, 

 most of which are 

 unsatisfactory, as 

 it is not always pos- 

 sible to keep up 

 sufficient and uni- 

 form pressure with- 

 out driving so fast 

 that the vines can 

 not be properly 

 covered with the 

 mixture. One of 

 these machines is 

 shown in figure 25. 

 This, with the addition of the two nozzles directed downward from 

 above, does fairly 

 good work. 



Carbonic-acid gas 

 furnishes excellent 

 power and does 

 entirely satisfac- 

 tory work in spray- 

 ing. The pressure 

 can be easily con- 

 trolled and there is 

 no pump to get 

 out of order. It is 

 considered s o m e - 

 what more expen- 

 sive than horse- 

 power or gasoline 

 power, however, 

 and unless one is so 

 situated that the 

 drums can be re- 

 charged promptly, 

 serious delays may 

 occur which will in- 

 terfere with the suc- 

 cess of the work. 

 A gas spraying out- 

 fit is shown in figure 

 26. A smaller tank 

 mounted on a two- 

 wheeled cart is also 

 used. 



Fig. 25. — A geared horse-power vineyard sprayer. This is provided 

 with a compressed air tank and an extra nozzle on each side directed 

 downward in order to spray the tops of the vines. 



Compressed air is used in the same way as gas (fig. 27). 



2S4 



The air 



