DISINFECTION 



407 



the proportion of oil ia controlled by means of a valve in 

 the kerosene chamber, and the desired percentage of oil is 



Fig. 167.— Spray Pump, small size, Fig. 168.— The Spray Nozzle, adjust- 

 an-anged to work from a bucket able to any degree of fineness, and 



(Demiug Co.). throwing a fine mist-like spray. 



Fig. 169. -Spray Pump, arranged on barrel cart, for disinfecting. 



indicated on a dial. The kerosene is mechanically mixed 

 with the water during the process of pumping. 



Digitized by Microsoft® 



