NEW YORK AGRICULTURAL EXPERIMENT STATION, 157 
~ are 50 inches in diameter. The fore-wheels are 40 inches in di- 
ameter. They were obtained of the Electric Wheel Co., Quincy, 
Il. 
TANK. 
A half-round tank was obtained from Thompson, Habmar and 
Fisher, Tonawanda, N. Y. It is made of 1? inch cypress, the top 
cross plates being 2x5 inch oak. Dimensions 6 feet by 2 feet 94 
inches by 1 foot 9 inches, capacity 250 gallons. 
GEARING. 
The pump is geared to the left hind wheel by means of chains 
combined with a shaft and four sprocket-wheels. The large 
sprocket-wheel, which is attached to the truck wheel, has a 
diameter of 25 inches and bears 49 teeth. The small sprocket- 
wheel on end of shaft is 84} inches in diameter, and has 16 teeth. 
The large sprocket-wheel on shaft has a diameter of 17 inches 
and carries 32 teeth. The small 8 toothed sprocket-wheel on 
crank shaft of pump has a diameter of 5 inches. A. “ clutch- 
gear” is attached to large sprocket-wheel on shaft. The size of 
chain used is No. 45. 
PUMP. 
The selection of a pump was not an easy matter. It was neces- 
sary to have a pump that would throw at least 300 gallons per 
hour. Rotary pumps would ‘meet the above requirement, but 
these have usually been found short lived when used for pump- 
ing Bordeaux mixture. The addition of the resin solution is hard 
on single plunger brass pumps and would make matters worse 
in the case of rotary pumps. No manufacturers of single or even 
double-plunger brass pumps would warrant their pumps to throw 
300 gallons per hour, nor could any of them tell how high it 
would be necessary to speed such a pump to make it throw the 
required amount. 
It was finally decided to test a single-acting triplex pump made 
by the Gould Manufacturing Company, Seneca Falls, N. Y. This 
pump was scheduled to make 50 revolutions per minute and 
throw 360 gallons per hour. It had the disadvantage of having 
