barrel to the sprayer. In this way the use of buckets is entirely 

 dispensed with. The cost of this supplementary apparatus is 

 £$ lis., and such a pump can deliver 1,100 gallons per hour. 

 Where a large area is to be sprayed its use is recommended. 



In discussing the results it will be convenient to take them 

 under the following heads: 



I. EFFICIENCY OF MACHINES 



Where the solutions were free from particles of solid mat- 

 ter the spray produced by both machines gave complete satis- 

 faction, but great care had to be taken to prevent foreign 

 material gaining entrance to the reservoir. Even very small 

 particles will choke the nozzles. The outer nozzles are much 

 more liable to be obstructed than those in the center. Fortun- 

 ately any obstruction in the nozzles can be quickly removed. 



It is necessary to have a supply of water free from solid 

 particles, and the reservoir of the sprayer and the inside of the 

 mixing-barrel have to be very carefully washed out before the 

 operations are started. 



With each sprayer a sieve is provided through which the 

 solution may be strained, but in addition it is advisable to pass 

 it through a piece of very fine sacking. 



One of the disadvantages of the smaller machines was the 

 difficulty in getting a sufficient quantity of the solution 

 applied. An attempt was made to put on about 40 gallons per 

 acre, but 35 was found more practicable. 



Messrs. Strawsons inform me that it is their intention next 

 year to provide their smaller machines with a larger pump 

 without additional cost. The problem of delivering a sufficient 

 quantity at one dressing will thus be solved. With this 

 improvement the smaller machine will meet the requirements 

 of any one wishing to spray charlock or runch. The larger 

 machine is, of course, more easily worked, but unless the farmer 

 intends to make use of it for spraying potatoes as well as char- 

 lock, the smaller machine will sufficiently meet the case. 



The area that can be sprayed with one of these machines 

 in one day will of course depend upon the facilities for obtain- 

 ing water. On account of the experimental nature of the 

 work, there were many delays that would not occur in ordinary 

 practice. Taking into account the delay involved in recharg- 

 ing the machine a day's work can only be reckoned at from 15 

 to 20 acres. 



