264 



operator a shallow concave cup,/, is fastened with a screw to the lower 

 eud of the rod. This deflects and throws the liquid forward. This de- 

 vice was added to the nozzle by Prof. F. L, Scribner, formerly Mycolo- 

 gist of this Department, and is an important addition, especially when 

 spraying overhead. 



This nozzle accomjilishes the desired work equally as well as those 

 without the disgorging or cleansing attachment, and the disgorger is a 

 great convenience when spraying with solutions which are not clear. 

 This is one of the most satisfactory nozzles for spraying lime solutions. 

 The diameter of the discharge orifice is made much larger for using 

 lime-water and the heavy suspension liquids which are used as fungi- 

 cides than is necessary for ordinary insecticide preparations. If the 

 orifice is too large the liquid passes out in a thin cone-shaped sheet 

 and fe not broken into fine spray. 



As will be seen from the illustration, this nozzle can be screwed into 

 the coupling at the end of the discharge pipe and used as a side dis- 

 charge nozzle, or by using an elbow coupling the discharge may be di- 

 rect from the distal eud. 



Recently M, Vermorel has altered the construction of this nozzle so 

 as to make the eddy chamber adjustable on the stem, thus permitting 

 the spray to be directed at any desired point within the circumference 

 of a circle. Fig. 59 will help to illustrate how this is accomplished. 

 This style is made in singles and doublets. The illustration gives the 

 doublet. The chambers, a and «', on either side are fitted into the stem 

 c by short smooth nipples, h and h', projecting out from the body of the 

 chambers. They closely fit the circular oi)ening through the head of 

 the stem c, but permit the chambers to freely rotate around the axis of 

 a line drawn through their base. From the center of the nipple of the 

 chamber a a brass rod extends through the head of the stem c and 

 through the base of the chamber a', below the eddy chamber, and 

 enters the thumb screw,/. By loosening this thumb-screw the nozzles 

 can be freely rotated and by tightening it it is firmly held in place at 

 whatever angle desired. 



In the cut the parts of the nozzle are shown separated, yet in a line 

 occupying their relative positions in the perfect nozzle. Mounted in 



e ^ e 



h d 



Fir,.59.— Iniprovt'd Vciiiioiel Nozzle— rediicetl iiboiit oni'liaU' (Orijjinal). 



this manner only the chamber a can be fitted with a disgorger, as the 

 rod which binds the chambers together would necessarily interfere with 

 putting one into the chamber, a'. 



