ALFALFA WEEVIL. 13 
at the middle, where a cross is used, and the ends are fitted with L’s. 
Unless reducing T’s, L’s, and cross can be obtained, a 4 inch by } inch 
bushing must be used for each nozzle, and in either case the attach- 
ment is made by means of a short one-fourth inch nipple. The hose 
lead from the pump is attached by means of a hose coupling. There 
should be a stopcock between the hose coupler and the main pipe to 
cut off the flow and maintain pressure whenever it is necessary to stop 
spraying in order to clean or repair nozzles. 
The number of joints of pipe and nozzles to be used depends upon 
the capacity of the pump. A 2% horsepower engine and a good 
pump will supply seven nozzles of the eddy-chamber type, with 
¢z inch holes in the disks, and maintain a pressure of 150 to 200 
Fic. 7.—Alfalfa sprayer with power pump, in use against the alfalfa weevil. (Original.) 
pounds. Some hand pumps will hardly supply three nozzles The noz- 
zles are likely to become clogged, no matter how much care is taken 
to have the solution and the apparatus free from foreign particles. In 
addition to such precautions, therefore, it is wise to use nozzles 
provided with direct cleanouts at a slightly higher cost, as the time 
saved in operation makes up for the extra cost. Before work is 
begun, the tank, pump, hose, iron pipe, and nozzles should be thor- 
oughly cleaned to remove particles of rust, sediment, and other 
foreign matter. The water and poison should be screened through 
fine brass strainer cloth. Attention to these details makes the dif- 
ference between economical and expensive spraying, as clogging of 
-the nozzles means costly delay for the entire outfit. 
The cost of spraying with a power sprayer will depend largely 
upon the distance water must be hauled. It should range from 70 
