36 



Bordeanx type (Fig. 18) is most eommonly used for spraying 



Figure 18 



the Bordeaux mixture. Its desirable characters are that it 

 has a large aperture and still throws moderately fine spray. 

 The large aperatnre tends to prevent clogging, but should this 

 occur, the lever at the side may be tnrned so that a solid 

 stream is thrown, which usually dislodges the obstruction. 

 The solid stream is also used in spraying the tops of very tall 

 trees. The Vermorel (Fig. 19) is used for spraying mixtures 



Figure 19 



containing less sediment than Bordeaux, although it is quite 

 eommoly used for Bordeaux as well. For dislodging partieules 

 in the aperture, pressure upon the nut at the extreme end 

 drives a pointed pin through the opening. The improved 

 Vermorels have a removable washer at the diseharge end, and 

 when the passing of the spraying mixture wears the aperture 

 large, tbus giving a eoarse spray, the disk may be replaced by a 

 new one. The practiee is to use these nozzles in clusters, the 



