INSECTS AND INSECTICIDES. 
7 
parties. We have used the formula of Prof. Riley, of 
the Department of Agriculture, which is as follows: 
Kerosene, 2 gallons. 
Water, 1 gallon. 
Soap, -J pound. 
The water and soap to be boiled and added to the 
kerosene, churning the whole violently with a syringe or 
pump until the materials have assumed the consistence 
of cream. The emulsion is then diluted, using one part 
of the latter to nine parts of water. In using it on the 
young leaves of plants, it is desirable to have a greater 
proportion of water. 
The plant grower must use his own judgment in re¬ 
gard to this. In some cases, as against the woolly aphis on 
the roots of apple trees, it may be used stronger than ordi¬ 
narily recommended. 
Cultivators should, to avoid the hurry of the growing 
season, prepare this emulsion in some quantity early in 
spring before the rush of work, and putin a large vessel, 
to be corked tightly until needed. 
Future work in the arid region will exhibit a necessity 
for its use on many occasions before a season’s work is com¬ 
pleted. A prompt application will always prove invaluable in 
any contest with insect enemies. 
APPLYING INSECTICIDES. 
Much thought and ingenuity have been given to devising 
apparatus for the economic and safe application of insecti¬ 
cides. ‘ 
We have used the Woodason double-cone bellows, and 
while it is far from being perfect, being liable to clog, still it 
is the best w T e know of at present for the application of poi¬ 
sons in the dry form. 
To apply insecticides in the liquid form, a force pump is 
required, which for work on a small scale may be used by 
hand. On a larger scale we have used this season a Field 
force pump attached to a tank, the latter placed on the seat 
