SPRAY NOZZLE FOR OIL WITH WATER, ETC. 



115 



The <reiieral structure of our apparatus has ah'eady beeu indicated 

 by the quotation from ]\Ir. Marhitt. A compressed-air pumj) was 

 attached to two steel boilers, which were connected so that the same 

 pressure was constant upon both of them. Oil was placed in one 

 tank and water in the other, and a lead of hose carried each sepa- 

 rately to the extension rod which kept them separate until after they 

 had left the nozzle. The ijeneral appearance of the pump Avas much 



Kic. 7. — Compressed-air pump, suitable for spraying a mochanical mixture of oil and 

 water, when fitted with the nozzle herein described. 



like that in figure 7, which is tlial t)f a compressed-air sprayer made 

 by an Ohio manufacturer, but which was not designed for using oil 

 and water. The extension rod and nozzle are shown in figure G. The 

 rod is constructed of brass, is of any desired base, and consists of an 

 inner tube carrying the oil for the hose connecting it with the oil 

 tank and an outer tube connected with hose to the water tank. At 

 the end of the rod proper the base of the nozzle was screwed on, which 



