324 REPORT OF THE DEPARTMENT OF ENTOMOLOGY OF THE 
DETAILED RESULTS. 
The apples in Experiment IV, Nos. 20-22, showed the facts 
noted below, when finally examined, September 27: 
Apple No. 20.— Three adult females alive, with from 2 to 14 
dead and from 0 to 12 living young under their scales. All of 
the remaining scales dead. 
Apple No. 21.— Four adult females alive, with from 3 to 16 
dead and from 0 to 8 living young under their scales; 3 scales of 
hibernating stage alive. Remaining scales dead. 
Apple No. 22.—-Two adult females dead, with 5 and 9 dead 
young respectively under their scales; 1 adult female with 38 liv- 
ing young under her scale; 16 females recently past first molt 
alive. Remaining scales dead. 
CONCLUSIONS. 
That the treatment prevented normal reproduction and growth 
of the scales is apparent from the comparatively few young pro- 
duced and the large percentage of scales in all stages of develop- 
ment that were killed. The destruction of the young may have 
been due in part to the excessive amount of water, but from the 
fact that many did not succeed in escaping from beneath the 
parent scale, and also from the fact that many of the adult scales 
as well as those that had recently settled down or had already 
reached the hibernating stage were killed, it is apparent that the 
poisonous and mechanical properties of the wash were responsi- 
ble for a large part of the work of destruction. 
EXPERIMENT V. 
This experiment and the next were conducted in large part as 
checks upon the preceding experiments. In these two experi- 
ments the soluble and insoluble ingredients of the wash were 
tested separately. In addition to acting as a check the two 
experiments furnish further data upon the action of the soluble 
ingredients and the precipitate upon the scales. For this experi- 
ment the soluble ingredients only were used. 
The material for treating the four infested apples selected was 
secured by coating another one of the glass plates with a heavy 
