42 
VIVIU REPORT OF THE ENTOMOLOGICAL COMMISSION. 
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 -tields, has already been referred to and is hgured in the fourth 
report. 
Host 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 
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. In 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 pass 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. It is cut 
out of a heavy piece of sole leather and fitted snugly over the rod a 
few inches below the 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. 
Fu;.9.— Parts of hose 
pole device for 
spraying trees: 
bamboo pole, 6 b ,• 
drip washr.j; hose 
h X; side liook. P ; 
eddy chamber no*- 
zle, n m,- spray, 2*, 
