263 



INSECTICIDE APPLIANCES. 



By C. V. Riley. 



[ Continued from jy. 249. ] 



- FOREiaN MODIFICATION OF THE RILEY NOZZLE (('ontinued). 



The Ver morel Nozzle. — Another and perhaps the most important modi- 

 fication of the Eiley nozzle is that of V. Yermorel, Yillefranche (Rhone), 

 France. It is well shown both entire and in section at fig:. 58. 



Fig. 58. — The Vermorel Xozzle — natural size (Original). 



The important part of this nozzle is the disgorger, an attachment for 

 removing obstructions from the discharge orifice. This is accomi^lished 

 by perforating the bottom of the cylindrical chamber with a circular 

 opening about half the diameter of the chamber. Into this is inserted 

 from above a rod, which is circular terminally but preferably triangular 

 below and fitting loosely in the orifice. This rod projects below the 

 chamber so as to give movement enough to permit its distal end to be 

 thrust through the opening in the removable cap, c. The part of the rod 

 within the chamber consists of a seat which is ground to fit the bottom 

 of the chamber when the rod is forced down by the water in action, as 

 shown in the section, B, thus preventing the escape of liquid, an object 

 which is further assured by fitting a rubber casket, e, on the lower sur- 

 face of the seat. Above the seat the rod is cylindrical and of consider- 

 able size until near the end, <Z, where it is dressed to a diameter small 

 enough to pass through the discharge orifice. The dimensions of the 

 different parts of this rod must be governed by the size of the parts of 

 the chamber. 



When the discharge becomes obstructed the rod is pressed forward 

 until the small end shown at d forces out the obstruction. The press- 

 ure once remo'f^ed the rod falls back to its place. While the rod is 

 pressed forward the water rushes out around it through the lower part 

 of the chamber, thus completely washing out sediment of any kind. To 

 prevent this outflow at the base of the chamber from falling upon the 



