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JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 16 
done satisfactorily. We are going to do our best to try out this method 
next summer. 
Mr. A. F. Burgess: The danger element, I think, has been over¬ 
looked to a great extent in connection with this work. I am told by 
aviators and by others who are well informed concerning aeroplanes, 
that in ordinary cross-country flying they keep away from forest areas, 
unless the machines are at a high altitude; that is because they are more 
apt to encounter bad air currents. I was very thankful when the experi¬ 
ment was over and no one was hurt. New England is recognized as a 
very bad country to fly in. It is rough and broken, rather heavily 
wooded, and favorable landing places are very scarce. 
Mr. E. P. Felt: I hope something will be done along this line be¬ 
cause it seems to me that if we are going to attempt to hold the gipsy 
moth in New York, it may be necessary to poison extensive wooded 
areas to the east. I believe the method ought to be tested thoroughly, 
probably with a lighter than air machine. 
Mr. A. F. Burgess: This matter is under consideration and we hope 
to do something along that line another season. 
Mr. J. S. Houser: In our consideration of this method we should 
remember that these are initial trials conducted with a primitive type of 
apparatus and without experience in the manipulation of the machine. 
It is unfair to pass judgment on its ultimate value by comparing it with 
our present day highly developed solid stream liquid machines which are 
the result of years of experiment and study. If we must make com¬ 
parisons, let us compare this, the earliest aerial duster with the earlier 
types of liquid sprayers. 
In the treatment of large forest areas, it is doubtful if it would be 
advisable to fly crosswise of the wind, but rather to head directly into 
the wind. The distribution of the powder thus would be much narrowed 
down and w r ould permit one to fly much higher. 
Another point is that we need a hopper with a much increased dis¬ 
tributing capacity which would permit a sufficient degree of concen¬ 
tration even though one flew higher. 
I know it is hazardous to fly low, but as I crossed the Berkshire 
Hills on my way to Boston, I wondered how it would be humanly possible 
to use a liquid sprayer under such very formidable conditions. Since 
the time seems near at hand when something must be done by way of 
insect control in this rough, broken area, does not the aeroplane duster 
offer more hope than any other method in sight at the present time? 
