100 
ORCHARD MOTH CATERPILLARS. 
The sketch below (from M. Vermorel’s circulars) shows the method 
of carrying the “ knapsack.” The sample I have seen fits well and 
easily on the shoulders. It is a metal reservoir, solid, or rather 
standing on a deep strong rim below, so that when set on the ground it 
will stand safely, without necessitating help from a worker to hold the 
apparatus up whilst another fills it. A large opening, with moveable 
lid and wire sieve within, allows of the apparatus being quickly 
filled, and (when the sieve is lifted out) also permits of entrance of 
the hand to clean the inside, and there is automatic arrange¬ 
ment for keeping the mixture in movement. The distribution is 
effected b} r a hose attached to the reservoir or knapsack, with requisite 
arrangements and adjustable nozzle to distribute the application as a 
fine spray or mist. The reservoir may contain about three and a half 
gallons. 
In the paper on insecticides recently reprinted by the U.S.A. 
Department of Agriculture, Prof. C. Y. Eiley mentions the “ Yermorel 
nozzle ” as one of the most successful of the modifications of the 
“Eiley nozzle” used in the States. The great advantage of this 
nozzle is that by a special arrangement it can be cleaned inside when 
it becomes clogged. 
Another form of spraying machine has been mentioned to me by 
Mr. C. Lee Campbell, of Glewstone Court, Eoss, who has given great 
attention to Paris-green spraying on his own orchards of about 6000 
trees, during the past season, as being very serviceable. It is fitted 
with powerful pump and two jets and sprayers, and also automatic 
dashers for keeping the fluid properly mixed. The pumps will draw 
to a height of thirty to forty feet. The barrel holds about thirty-six 
gallons of water, 
