World first crop dusting experiment (August 3rd 1921, Troy, Ohio) using an aircraft - Left: McCook Field engineer Etienne Dormoy (left) who designed the hopper and operated it during the flight ; Right: Lieut. J.A. Macready who piloted the plane (Curtiss JN-6).
Unknown author<span style="display: none;">Unknown author</span>
1921-08-03
<p>Houser, J. S. "The Airplane in Catalpa Sphinx Control." Ohio Agricultural Experiment Station, Monthly Bulletin 7 (1922): 126-36
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