Diseases of the Potato. 327 



clogged repeatedly, and proved to be unsuited to throwing Bor- 

 deaux mixture. 



"A change was introduced with the appearance of Sainins' 

 machine, this being known as ' Roberts ' Improved Atomizer.' It 

 is designed to spray four rows. Three small streams of liquid left 

 the machine over each row, but immediately upon leaving the dis- 

 charge pipes, they were broken by blasts of air into an exceedingly 

 line spray which was well distributed over the plants. The machine 

 worked admirably, and demonstrated its capability of spraying 

 4 rows of potatoes as fast as a walking team could draw it. The 

 amount of liquid leaving the discharge pipes was found to be too 

 small, but this defect could be easily remedied. Another objection 

 was the cost of the machine, the price being $65.00. 



" Power sprayers were represented by Deming's ' Monarch.^ 

 This is constructed so that five rows may be sprayed at once. A 

 double-acting brass pump is worked by gearing, and it is sufficiently 

 powerful to supply the nozzles, which are held ov^er each row, with 

 the required amount of liquid. The work of this machine was also 

 very satisfactory. The spray was produced continuously, it was 

 forcibly applied to the plants, and the amount of liquid thrown 

 conld be varied by the use of different nozzles. The 'Monarch' 

 was one of the most useful machines exhibited ; but its high price, 

 $75.00, is an item which may discourage some from using it. 



'' The greatest sensation of the day, however, was occasioned by 

 the appearance of the home-made spraj'er of Potter and Ware. 

 Figure 100 represents the appearance of the outfit. An ordinary 

 barrel spray pump was fastened to a barrel having a capacity of 

 about hfty gallons. The liquid was pumped into a gas-pipe wdiich 

 was supported upon a light frame at the rear of the wheels. This 

 pipe was fitted with four discharges to which nozzles could be 

 attached. Four rows were sprayed at once, the work being fairly 

 well accomplished as the horse walked across the field. Mr. Ware 

 drove and pumped at the same time, and the machine worked 

 without a break. The plants were uniformly although rather 

 lightly covered, and the machine was pronounced a decided success 

 by the four or five hundred people who saw it in operation. It 

 should serve as a model to potato growers who desire this kind of 

 an outfit. 



