Illustrations and tables have been moved out of the text, and footnotes have been moved to directly under the paragraph or table they refer to. Obvious punctuation and typographical errors have been corrected silently. In some formulas × has been inserted for consistency; brackets have been added for clarity where necessary. Page vii: battaillons Kommandeur changed to Bataillonskommandeur Page x: 1 in 20 changed to 1 in 10 (as discussed in the remainder of the paragraph) Page 24, table: ·64 changed to 7·64 Page 73: all the air effected changed to all the air affected Page 110: Hargraves’ changed to Hargrave’s Page 128: over estimated changed to over-estimated. End of Project Gutenberg's Artificial and Natural Flight, by Hiram S. Maxim