1910-1913. Each is approx. 7x10" with an average of 40 bw pages. Group ranges from Vol.6 #3 to Vol.13 #2. Includes March & June 1910; Sept. 1911; March, May-June, July, Oct. 1912; January & August 1913. Cover ads include aviation related photos. March 1912 front cover has photo of "First Parachute Leap From An Aeroplane", front cover of Oct. 1912 issue has photo of aviator Jannus winning $450 in one minute by carrying three people at Cicero air meet, January 1913 front cover shows "The Fabre Hydroaeroplane The First Successful Water Flying Machine", August 1913 front cover shows Curtiss flying boat winning the 900 miles cruising contest. March and June 1910 back covers feature ad for French-American balloon company with photo of "Aero Club Grounds Centennial Contest St. Louis Mo." showing several balloons being inflated with crowds nearby. Contents include numerous photos and technical data along with various ads. March 1910 issue has photo centerfold for Los Angeles aviation show featuring airplanes, airships, and balloons; Sept. 1911 issue has 8-page article illustrated with photos and diagrams for model B Wright biplane, May-June 1912 issue has 4-1/2 page illustrated article on Wright model C biplane, and Oct. 1912 issue has article with photo on "Lewis Aeroplane Gun" showing two men in biplane with one holding machine gun. Ads include Curtiss Aviation, Roberts Motors Co., Bleriot Monoplanes, Goodyear balloons w/photo of large balloon & much more. Covers have some dust with lt. creasing and a few faint moisture marks here and there. Overall Good to VG. Contents are Fine to Exc. All issues are complete and provide an interesting glimpse into early aviation history.