New YorK AGRICULTURAL EXPERIMENT STATION. 159 
sure valve and return 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 most difficult problem of the whole machine to 
work out was the nozzle-carrier. 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 
rows 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. 83 by means of a J 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. 
