First published in 1889 by Otto Lilienthal, this is a reprint of the original work. It contains over 100 original photos, drawings, and graphs, and the observations of 30 years of aeronautical experiments by Otto Lilienthal and his younger brother Gustav. This is the book read by nearly every aviation pioneer. 151 pages.
"As a scientific investigator, none of his contemporaries was his equal. [Otto Lilienthal] set forth the advantages of arched wings in such convincing manner as to make him the real originator of this feature. Others had noted that birds’ wings were arched and had speculated on the possibility that an arched wing was superior to an absolutely true plane, but Lilienthal demonstrated the reason why it was better, and changed mere speculation into accepted knowledge." - Wilbur Wright, May 1912
