New York Agricultural Experiment Station. 159 



t^nro valve and retiiru overflow pipe, with connections, are 1 



inch. 



nozzle-carrier. 



All the foregoing parts are simply necessary means to an end, 

 which any mechanic unfamiliar with spraying could easily have 

 designed. The mcst difficult problem of the whole machine to 

 work out was the nozzle-canier. In order to do the work thor- 

 oughly it is necessary for the spray to reach the plants from all 

 directions. 



In a moving machine this must be accomplished by arranging 

 the nozzles to spray forward and backward from above and dia- 

 gonally forward and backward from the sides at both top and 

 bottom. At the same time provision must be made for treating 

 r-ows set different distances apart, also of varying widths, and 

 asparagus of different sizes, and for elevating the nozzles when 

 turning at the ends of the rows. The whole problem was finally 

 solved by the combination of union joints allowing shear motion, 

 and telescoping joints. The union joints are useful not only in 

 allowing of a shear motion but also to give direction to the noz- 

 zles. 



At first it was thought necessary to have the telescoping joints 

 of ground tubing, and a carrier was constructed on this principle. 

 By trial it was found that ordinary iron sizes of brass tubing, 

 such as are handled by the trade, could be packed tightly enough 

 to prevent leakage and answered the purpose better than ground 

 tubing, as joints made with the latter soon became so gummed 

 with the resin solution as to be nearly immovable. The essential 

 parts of this nozzle-carrier are shown in Figs. 3 and 4, Plate XVII, 

 and most of the parts are self-explanatory. Fig. 4 connects with 

 Fig. 3 by means of a T shown at g. Fig. 3 shows one-half of 

 the carrier and connects with main supply pipe. Fig. 2, at y. 

 The number and arrangement of the nozzles are shown in the 

 various photographs which illustrate the machine as a whole in 

 different positions and at work. All the parts with which the 

 Bordeaux mixture comes in contact are constructed of brass. 



