New York AGRICULTURAL EXPERIMENT STATION. TOL 
worked from either a horizontal or vertical position. Like the 
rotary pumps, no packing is used, and they are open to the 
same objections. They do excellent work, while the adjust- 
ments fit closely, but they are soon worn out. When purchasing 
either a rotary or semi-rotary pump, only those should be 
selected that are made entirely of brass. In those that are 
advertised as having brass working parts, the cylinder is made 
of cast iron, which will soon rust, causing the working parts 
to wear out rapidly. The ‘Clock” semi-rotary pump, illus- 
trated in figure 18, manufactured by the Gould’s Manufacturing 
Co., Seneca Falls, N. Y., was used with satisfactory results at this 
Station during the past season. 
AGITATORS. 
In applying either Bordeaux mixture or Paris green it is very 
necessary that the liquid be thoroughly stirred in order to insure 
uniform strength in the application, otherwise the copper com- 
pounds and Paris green will settle to the bottom of the tank. 
Experience has shown that agitating by means of a hose return- 
ing a stream tothe bottom of the tank is unsatisfactory. A 
wooden dash or paddle may be usually fitted to the pump some- 
thing after the manner shown in Plate V,so that with every stroke 
of the pump it may stir the mixture. When necessary, as for 
instance after the tank has been standing still for a few minutes 
this agitator may be supplemented by stirring the mixture thor- 
oughly with a stick. 
The agitator is found to be one of the weak points in most 
power sprayers now on the market. In testing sprayers the past 
season particular attention was given to the various stirring de- 
vices, and in nearly every case they were found to be unsatisfac- 
tory. The best agitator that we have seen was a home-made 
affair, simple in construction, but doing very effectual work. The 
illustration in Plate V explains itself. The tank is placed in an 
upright position. A crank-shaft with a fairly long stroke causes 
an up and down churning motion of the agitator. This is geared 
so as t» run whenever the wagon is in motion, thus keeping the 
liquid in a constant state of violent agitation. 
| Nozzuxes. 
In recent years many good nozzles for applying fungicides ard 
insecticides have been devised, but it is generaly conceded that, 
