322 REporRT OF THE DEPARTMENT OF ENTOMOLOGY OF THE 
EXPERIMENT IV. 
The object of this experiment was to imitate a condition often 
occurring on a tree, especially where the wash is not evenly 
applied. The condition referred to is that of a number of scales 
in close proximity to a coating of the wash but which have not 
been touched by it. By applying water frequently in the form 
of a fine spray, a condition often occurring in orchards during 
wet seasons was brought about. Naturally some of the ingre- 
dients of the dried coating of the compound would be washed 
- upon the scales and by this means it could be determined to what 
extent the treatment thus brought about could be depended upon 
to kill the scale in various stages of development. This has a 
direct bearing upon the degree of thoroughness necessary in 
treating infested orchards with the lime-sulphur-salt wash. It 
is to be noted, however, that, in this case, although the apples 
were sprayed very carefully and very gently it is not improbable 
that the daily treatment of water may have killed some of the 
young scales. 
For the experiment three apples were selected that were in- 
fested at the stem and blossom ends only. The sides of the 
apples were well coated with the wash, which was allowed to 
dry. They were then sprayed with water from an atomizer 
every day for fifteen days. 
A summary of the treatment is given in the following table: 
