Idi REPORT 4, UNITED STATES ENTOMOLOGICAL COMMISSION. 



Another modification of tlie same principle apx)ears in a nozzle claimed 

 in an insecticide machine in i)atent ]So. 2607G1, July 11, 1882, by Mr. G. 

 G. Lynch, of Illawara, La. The sprays from all these plug-roses are 

 comparatively coarse and cannot be well adapted to poisoning on under- 

 surfoces, while tlie pores are very liable to become stopped. 



Colliding JETS. — The nozzleresembling a gas-jet (in Plate XY, Fig. 5), 

 having two converging outlets bj' which the two streams emitted meet, as 

 shown by the arrows, to form a tis-h-tailed spray, has been used. When 

 great pressure is applied to the w^ater forced through it, as by a force- 

 pump or by Mr. Daughtrey's air pump machine (Plate XXXVI), the two 

 streams meet with such great dispersing force as to dash each other into 

 a fine spray. The arrangement of the outlets at the closed end of a 

 tube and their smallness in size and number as used in machines here- 

 tofore, and as they must be to give small enough sprays for single rows 

 in poisoning from beneath, subject them to clogging to an extent un- 

 practical for this purijose. The stoppage of eitlier hole destroys all the 

 spraying power. For very large sprays in broadcast sprinkling the size 

 of the outlets may be increased to a practical extent, and a number of 

 such converging and interruptijig streamlets may be produced from 

 holes in the same plane or from the surface of a pipe or the face of a noz- 

 zle which, is concave or funnel-shaped. In rose-lieads, with or without 

 rev^ersible faces, the holes can be cut in pairs of twos or in threes, such 

 that their jets will collide, and a row of such pairs can be used on the 

 side of a trailing pipe. 



For spraying upwards I have produced the twin jets from the side of 

 a tube, near its end, and from a terminal chamber. The tube should 

 open by a cap or plug for cleaning out, and in its best shape has a ter- 

 minal recurrent or rotation chamber or passage as described elsewhere. 



A nozzle-end essentially the same as the perforated one used in gas- 

 jets and combined in Mr. Daugh trey's machine, but without the internal 

 cone, n^, which is more likely to assist clogging than prevent it, was pat- 

 ented in 1878 (Xo. 202207) as an attachment upon the ends of hose- 

 nozzles, by Mr. Adolpli Weber, of Detroit, Mich. A nose-piece hav- 

 ing this kind of discharge and also a parallel main bore for a solid jet, 

 but combined with the end of a hose-i)ipe by a slide-plate base, so that 

 either kind of jet may be adjustably set in use instead of the other, was 

 secured to Mr. A. B. Prouty, of Worcester, Mass., in patent Xo. 225721^ 

 March 23, 1880. 



On account of the holes being larger and fewer, with the dispersion 

 principle to produce fineness, these are certainly among the best noz- 

 zles of this class. 



y -ROSES.— Broad sprays have been produced through tubular y- 

 shaped, many-punctured nozzles. This principle is used in the ordinary 

 street-sprinklers, but similar long perforated cross pipes have been 

 hauled above the cotton plants for sprinkling them. A good illustration 

 of this is seen iii the ^'Yeager Cotton Sprinkler" (Plate LIY, Fig- 7), 



