THE ELM-LEAF BEETLE IN NEW YORK STATE 23 



hold the poisonous mixture, while a ladder facilitates the work 

 greatly. 



One of the best arrangements for hand work is most probably 

 found in the spraying outfit mounted on wheels so that it can 

 be readily moved from place to place (Plate 5). In most cases 

 this takes the form of a box or barrel to which a force pump is 

 firmly attached, and either provided with wheels or else de- 

 signed to be placed in a wagon. In spraying tall trees 25 to 50 

 or more feet of J or -J inch hose should be provided, while the 

 addition of a brass or iron and brass extension 10 to 25 feet 

 long adds materially to the value of the apparatus. It is also 

 necessary to have a good nozzle that will not clog, but 

 produce a fine spray and that can be quickly adjusted to throw 

 a coarse spray some distance if necessary. Such an outfit is of 

 great service to any individual having considerable spraying to 

 be done and undoubtedly it could be used to advantage by those 

 desiring to make a business of spraying in a small way, as for 

 example the treating of trees here and there for those in cities 

 desiring their trees sprayed and not willing to purchase the nec- 

 essary apparatus. 



In the extended work against this insect conducted by cities 

 and villages, it is desirable to have apparatus that will admit 

 of more rapid work. This has led to the refitting of retired fire 

 engines and the designing of more or less cumbersome outfit® 

 for this purpose. In all cases these makeshifts have been suc- 

 cessful, although they are not so satisfactory in operation as 

 those specially fitted for the purpose. Probably the best ap- 

 paratus yet designed for spraying trees is that constructed under 

 the direction of Dr E. B. Southwick, entomologist of the depart- 

 ment of public parks of the city of New York, and which is 

 the form used in Albany. The whole outfit is represented in 

 plate 4. It consists of a ^ Daimler ' gasoline niotor operating 

 a Gould force pump — the motor and pump weighing but 300 

 pounds can be placed in the bottom of a spring wagon along with 

 the 100-gallon tank containing the poisonous mixture. This 

 motor has the advantage of being almost noiseless in operation 



