Vienna: Carl Gerold's Sohn, 1895. 8vo. 13,  pp. FIRST EDITION. Text illustrations. Original printed wrappers (front wrapper reinforced) bound in modern cloth. Embossed stamp of the Institute of the Aeronautical Sciences on the front wrapper. Item #2320
First edition of the author's rare offprint of a talk read before the Akademie der Wissenschaften, and published in the Zeitschrift für Luftschiffahrt the following year, 1896. This paper presents Obermayer's vital research on the principles of wind movement over wing surfaces. It contributed to the experimentation which was taking place at the time in an effort to design the first effective fixed-wing aircraft, and mentions the work of Lileanthal.