15 



or more of them, every orchardist should have a "barrel 

 pump," These may be had in different sizes and full de- 



Fig. 3. 



scriptions may be found in the catalogs of the various 

 dealers whose addresses are given in the Appendix on page 

 20-21. 



In selecting an outfit for Lime-Sulfur work it is essen- 

 tial that all of the working parts of the pump be of brass 

 and that there be no leather packings or valves. The 

 caustic action of the wash soon corrodes copper and de- 

 stroys leather but affects brass only slowly. The best ap- 

 paratus is the cheapest in this case. The most economi- 

 cal outfit for the average orchardist is a barrel pump that 

 is powerful enough to carry two lines of hose with strong 

 pressure for four nozzles, (See fig. 3). 



The barrel in which the pump is mounted may well be 

 an ordinary 50-gallon oil barrel such as may be obtained 

 in any town and the mounting of the pump is a simple 



