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JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 16 
excess of lime suppresses the ionization of the calcium arsenate. The 
small amount of calcium in the calcium caseinate will produce a small 
amount of calcium arsenate, but there will not be sufficient to suppress 
the ionization of the calcium arsenate formed. The addition of further 
lime will reduce the soluble arsenate. 
President J. G. Sanders: Is there not considerable difference in the 
quality of the water used in different parts of the country? 
Mr. William Moore: A big difference. 
In the South you would have another factor due to an alkaline water, 
which reacts with lead arsenate. The presence of sodium carbonate 
will produce sodium arsenate which probably gives different results from 
either the arsenic acid or the calcium arsenate. 
Mr. P. J. Parrott: At present in New York State the matter of 
stickers is of great interest, and one of the problems of the economic 
entomologists is to advise the growers wisely. There is considerable 
difference of opinion as to their value. 
Mr. W. S. Regan: During the past season we used several hundred 
pounds of calcium caseinate spreader in connection with our arsenical 
sprays against the fruit tree leaf-roller, in the orchards of the Bitter Root 
Valley, Montana. We found that this spreader added materially to the 
efficiency of the arsenical sprays. In fact, with six to eight pounds of 
arsenate of lead, to the two hundred gallon tank, and one to two pounds 
of the caseinate spreader, we were able to obtain a kill of approximately 
ninety per cent of the caterpillars, when application was made at the 
calyx period, immediately after the falling of the blossoms. Also the 
addition of the caseinate spreader, when arsenate of lead and lime 
sulphur are combined, prevents the decomposition and formation of 
black sludge, which results when the spreader is not added. One to two 
pounds of spreader is more effective in preventing the decomposition 
than ten pounds of hydrated lime. 
Mr. William Moore : I would like to bring up another question while 
on this subject and leave it to you to think about. A few months ago 
I was going through the Edgewood Arsenal and I was very much 
surprised to see the amount of bottled milk standing about. Dr. 
Cook was with us at the time and being curious asked, ‘Why do the 
people drink so much milk here?” The answer was that the workers 
with arsenic compounds found that the use of milk aided in the elimi¬ 
nation of arsenic. 
President J. G. Sanders: The question of stickers is comparatively 
new and it seems to me that more information is needed from various 
