204 



of 120 pounds, or 8 atmospheres. The finest spray is that 

 given by the atomizer, a simple tin hand appliance limited 

 in its use to small plants at close range. iS^ext to the ato- 

 mizer comes the spray produced by the Ware nozzle, followed 

 by the Vermorel, Bordeaux and one-fourth-inch nozzle. The 

 latter nozzle deposits the spray in large spots, and the Bor- 

 deaux nozzle with a three-thirty-second-inch aperture does. the 

 same to a less extent. ISTeither of these nozzles as used in this 

 experiment is applicable to good work under low pressure. 

 The Bordeaux nozzle, however, can be modified so as to 

 produce a finer spray than that shown in the figure. 



At the present day the Ware and Vermorel types of nozzle 

 are not so generally used as the Mystry, Friend and Tiger 

 types. The Ware, which was devised for spraying the 

 foliage of large trees at close range, is now supplanted by 

 coarse nozzles with apertures varying from one-eighth to 

 five-sixteenths inches, to be used with high pressure. These 

 will throw the spray considerable distances, and break up 

 into a fine mist. 



The Bordeaux nozzle is still much used for the spraying 

 of fruit trees, especially for lime and sulphur spraying. The 

 remarkable results obtained by coarse-nozzle, high-pressure 

 spraying for gypsy and brown-tail moths and elm-leaf beetle 

 open up the question whether this kind of spraying cannot 

 be more extensively used for other kinds of work. 



