42 



FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



Jtl/L 



M 



This style of pump is especially convenient from the fact that it can 

 readily be bolted on to a tank of almost any shape or dimensions. 

 The fulcrum post is not cast with the flange-plate, but bolts to it. 

 The stirrer Pump. — A barrel-tank, with pump similar to the one just 

 described, attached, as used in the work of the commission in the cot- 

 ton-fields, has already been referred to and is figured in the fourth 

 report. 



Rose and Bamboo extension Rod. — The hose commonly used on spray 

 apparatus is half-inch in internal diameter, or even larger. This size is 

 entirely unnecessary and entails extra labor upon the 

 N^ Z >^ operator ; it is, moreover, quite difficult to get a small 



extension-rod of any length sufficiently strong to carry 

 such a hose. In the work of the Division of Ento- 

 mology I have found that a good quality of quarter- 

 inch cloth insertion rubber tubing is sufficiently strong 

 for all ordinary work. No spray-nozzle used by hand 

 power will require a stronger stream than this will 

 carry, lu some work it is convenient and necessary 

 to have as much as 30 feet of discharge-pipe, and 

 where this small tubing is used it can readily be 

 handled. 



For elevating the nozzle among the branches, a bam- 

 boo rod with the septa burned out so that the rubber 

 tubing may be passed through, and made in sections to 

 be adjusted to the desired length, is the most useful 

 contrivance. If this is large enough to admit the tube 

 to ijass up the center, and is provided with a clamp at 

 the top to hold the nozzle vertical or in any direction 

 desired, it is superior to any other device which I have 

 ever used. The smaller southern cane, so commonly 

 used for fishing tackle, makes a very good supporting 

 rod, but in such case the discharge-pipe must be fast- 

 ened to the outside by means of suitable spring 

 clasps. 



Fig. 9 shows a section of an extension pole of the 

 sort first mentioned above. A special feature of this 

 pole is the washer j, which prevents the drip from 

 trickling down the pole upon the operator. Jt is cut 

 out of a heavy piece of sole leather and fitted snugly over the rod a 

 few inches below tbe nozzle. 



By means of this supporting pole, trees below 20 feet in height can 

 readily be sprayed. For higher trees, I know of nothing better than 

 a ladder mounted on wheels so as to be easily moved from tree to tree, 

 such as has been used in California in the work against the Fluted 

 scale. This ladder is supported so that it does not rest against the 

 tree, and the operator can move up and down without being hindered 

 by projecting branches. 



i 



FiG.9.— Parts of hose 

 pole device for 

 spraying trees: 

 bamboo pole, b b ; 

 drip wash'r, j; hose 

 h X; side hook, v ; 

 eddy chamber noz- 

 zle, n rti; spray, z s. 



