Control of San Jose Scale With Lubricating Oil. 



15 



will in time destroy the rubber. The pump packing in most power 

 sprayers will withstand the hot oil for a considerable time. A 



Fig. 4. — Small plant suitable for tlie production of oil emulsion oni a commercial scale. 



nozzle with the disk and cap removed is satisfactory for use in 

 pumping the mixture. 



A small plant capable of producing oil emulsion on a commercial 

 scale is shown in Figure 4. The essential parts of this outfit are an 





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Pig. 5. — A convenient outfit for making- oil emulsion. 



engine and pump demounted from a power spray machine, two gal- 

 vanized tanks, and a steam line from an outside boiler. The stock 



