326 Agricultural Experiment Station, Ithaca, N. Y. 



" The first macliines in tlie field were those in which no pumps 

 were used for forcing the liquid. The only power used was the 

 force of gravity, the fluids passing downward from the tank to the 

 outlet orifices. The Steitz potato sprayer was soon found to be 

 working under disadvantage. The agitator broke almost at the 

 moment of starting. The machine is designed to spray two rows 

 at once; the liquid runs over two broad pieces of galvanized iron, 

 one being over each row, and then it is broken up into a fine spray 

 by means of rapidly revolving brushes. The holes through which 

 the liquid passed upon the iron were too small, so that^the plants 



100.— An excellent home-made potato sprayer, treating four rows. 



were not properly covered. Another objection to the machine was 

 found in the tank ; this was too small, and it could be increased two 

 or three times its present capacity to advantage. 



•'The Studebaker inaehine was built on the pattern of a street- 

 sprinkler. The mechanism- forming the discharge was designed to 

 be so constructed that any desired amount of liquid could be thrown 

 in a fairly fine spray. The machine could not be made to work 

 satisfactorily, as too much or too little liquid was thrown, and the 

 spray was altogether too course for efficient and economical work. 

 Even clear water was not thrown satisfactorily. 



" The Aspinwall sprayer was then tried, the result being some- 

 what similar to that produced by the preceding machine. It 



