29 



rather than oejoiid the entering point of tlie insecticide; second, tlie 

 Xixon nozzle is entirely inapi)licable to this form of apparatus, for 

 the reason that it chokes the flow so as to destroy the suction in the 

 insecticide tube. Xo nozzle has yet been devised free from this objec- 

 tion except a plain deflector tip. The author is aware that a deflector 

 does not give so good a si)ray as can be obtained in other ways, and 

 hopes yet to overcome this objection. 



The spraying device consists of a sort of lance, forked at the base. 

 One fork connects witli a hose to a hydrant or water supply under pres- 

 sure, and the other with a tube leading into the vessel containing the 

 insecticide. Both forks are provided with stopcocks. The suction 

 caused by the passage of the water through the lance induces a flow 

 through the fork and hose leading from the insecticide. 



To use the apparatus, attach to an ordinary lawn hose by the large 

 coupling. Turn on the city water, and it will be at once perceived 

 that there is a strong suction through the small or insecticide tube. 

 Put the end of this in a pail of water or kerosene, and, in the case of 

 the apparatus experimented with, 16 per cent of the total discharge 

 comes through it, the stopcock being wide open. By partly turning 

 off the stopcock the proportion of kerosene can be reduced at pleas- 

 ure, and the percentage may be indicated b}^ graduations on the back 

 part of the stopcock. 



For Paris green, make up a pailful at the rate of 1 ])Ound to 25 

 gallons of water, and when- drawn through the machine it will be 

 diluted at the 8 per cent kerosene gauge mark to 1 pound to 150 

 gallons and thoroughly mixed. 



The device was experimented with by the inventor with a water pres- 

 sure of 75 i^ounds, which was inferred to be an average for city water. 



Xo claim to novelt}^ for this device was made except in the applica- 

 tion. The i^rinciple is the same as that in the '^jet pum[)'" used for 

 draining out barges, cellars, etc. 



If the instrument deserves any name, it is suggested that it be called 

 the Idaho jet sprayer. 



Discussion of the foregoing papers followed. Mr. Southwiek had 

 canvassed the question of spraying from hydrants in his work in Cen- 

 tral Park, Xew York, but had found it impracticable on account of the 

 insufficient pressure of the water and the small number of hydrants. 

 He said he was devising a steam pump which he hoped would give 

 greater satisfaction than any apparatus hitherto used. 



Mr. Davis suggested that any apparatus dependent on a constant 

 water supply, as of hydrants, would be more feasible in the NVest in 

 connection wi^h irrigation plants. 



