Forty lbs. Sulphate of Iron is placed in a mixing barrel, 

 and on this water is poured. The mixture is then well-stirred, 

 and made up to 40 gallons, and after solution is transferred to 

 the barrel in the car. While this solution is being distributed 

 over an acre an assistant is engaged in preparing a charge 

 sufficient for another acre, and so on. 



In this way the work is only interrupted by the operation 

 of transferring the solution from the mixing barrel to the 

 sprayer. The operation was for the most part performed by 



No. 2 



the aid of two wooden buckets, a process which is slow and 

 very disagreeable to the persons engaged in it. In consequence 

 an arrangement was devised for overcoming this difficulty by 

 temporarily fixing a semi-rotary pump to the mixing-barrel 

 and transferring the liquid by means of this pump and a hose 

 into the sprayer. The arrangement is shown in the accompa- 

 nying illustration No. 2. The pump is so constructed that it 

 may either be used for filling the mixing barrel out of a ditch 

 or stream, or for transferring the solution from the mixing- 



