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Allied Aircraft - Demonstration At Polo Grounds, Caproni Biplane, Italian, 1917. Creator: Harris & Ewing
 
Aircraft Standardization Board - Joint Army-Navy Technical Board, 1917. Creator: Harris & Ewing
 
Wroughton Airfield solar farm, Swindon, 2016. Creator: Damian Grady
 
Portrait of Édouard Branly (1844-1940), physicist, c1920. Creator: Unknown
 
Bureau of Engraving And Printing - Treasury Department, 1912. Creator: Harris & Ewing
 
Government Printing office - Views, 1912. Creator: Harris & Ewing
 
Finger Printing, Records From Finger Print Bureau, Navy Department, 1912. Creator: Harris & Ewing
 
Finger Printing, J.S. Taylor At Bureau of Finger Print, Navy Department, 1912. Creator: Harris & Ewing
 
Lieutenant Theodore G. Ellyson, U.S.Navy, Testing Seaplane On Potomac, 1911. Creator: Harris & Ewing
 
Lieutenant Theodore G. Ellyson, U.S.Navy, Testing Seaplane On Potomac, 1911. Creator: Harris & Ewing
 
Lieutenant Theodore G. Ellyson, U.S.Navy, Testing Seaplane On Potomac, 1911. Creator: Harris & Ewing
 
Lieutenant Theodore G. Ellyson, U.S.Navy, Testing Seaplane On Potomac, 1911. Creator: Harris & Ewing
 
Lieutenant Theodore G. Ellyson, U.S.Navy, Testing Seaplane On Potomac, 1911. Creator: Harris & Ewing
 
Monorail Subway, Capitol To Senate Monorail System, 1912. Creator: Harris & Ewing
 
Monorail Subway, Capitol To Senate - Man Who Installed System, 1912. Creator: Harris & Ewing
 
Monorail Subway, Capitol To Senate - Man Who Installed System, 1912. Creator: Harris & Ewing
 
Philippines, 1912. Creator: Harris & Ewing
 
Puerto Rico. Int. of New And Old Sugar Mills, 1912. Creator: Harris & Ewing
 
Miss Bernetta Miller, Moissant [sic] - Famous French Aeronautic Family, 1911. Creator: Harris & Ewing
 
Miss Bernetta Miller, Moissant [sic] Aviatrix - In Bleriot Plane, 1911. Creator: Harris & Ewing
 
Post office Department - Motor Cycle Postman, 1912. Creator: Harris & Ewing
 
Army Aviation, College Park Aviation Field, 2nd Season - Wright Biplane, Type B..., 1912. Creator: Harris & Ewing
 
Army Aviation, College Park Aviation Field, 2nd Season - Capt. F.B. Hennessy, Curtiss Plane, 1912. Creator: Harris & Ewing
 
Lieutenant Franklin Kennedy, U.S.A., Aviator - In Curtiss Dual Control Airplane...Maryland, 1912. Creator: Harris & Ewing
 
Aviation, Navy - Commodore J.C. Gillmore In Curtiss Headless Plane, Dual Control..., 1912. Creator: Harris & Ewing
 
Army Aviation, College Park - Tests of Curtiss Plane For Army - Single Control, 1912. Creator: Harris & Ewing
 
Army Aviation - College Park Aviation Field, 2nd Season - Lt. Harry Graham, 1912. Creator: Harris & Ewing
 
Army Aviation, College Park Aviation Field, 2nd Season - Lt. H. Geiger, Lt. T. Dew. Milling, 1912. Creator: Harris & Ewing
 
Army Aviation, College Park - Aviator 2nd Lt. Harry Graham, U.S.Army Inf., 1912. Creator: Harris & Ewing
 
Paul Peck, Commercial Aviator - In Gyro Type Plane Sponsored By Berliner At Mineola, N.Y., 1911. Creator: Harris & Ewing
 
Democratic National Convention - Robert Crain of Baltimore, 1912. Creator: Harris & Ewing
 
Post office Department, Hupp Auto Railway Service, 1912. Creator: Harris & Ewing
 
Post office Department, Hupp Auto Railway Service, 1912. Creator: Harris & Ewing
 
Post office Department, Hupp Auto Railway Service, 1912. Creator: Harris & Ewing
 
Post office Department, Hupp Auto Railway Service, 1912. Creator: Harris & Ewing
 
Claude Grahame-White - Fixing Wing of His Forman Plane, 1910. Creator: Harris & Ewing
 
Grahame-White Flights, 1910. Creator: Harris & Ewing
 
Wright Flights, Fort Myer, Va, July 1909 - First Army Flights; Lt. Frank Lahm And Lt. Fonlois. Creator: Harris & Ewing
 
Wright Flights, Fort Myer, Va, July 1909 - First Army Flights, 1909 July. Creator: Harris & Ewing
 
Wright Flights, Fort Myer, Va, July 1909 - First Army Flights; Wilbur And Orville Wright... Creator: Harris & Ewing
 
Wright Flights, Fort Myer, Va, July 1909. Creator: Harris & Ewing
 
Wright Flights, Fort Myer, Va, July 1909 - Hangar, Wilbur Wright, Right, Showing His Objection To... Creator: Harris & Ewing
 
Wright Flights, Fort Myer, Va, July 1909 - First Army Flights; View of Wright Plane, 1909 July. Creator: Harris & Ewing
 
Boy Scouts - Visit of Sir Robert Baden-Powell To D.C. Making Fire; Mrs. Taft Watching, 1911. Creator: Harris & Ewing
 
Boy Scouts - Visit of Sir Robert Baden-Powell To D.C. Making Fire; Mrs. Taft Watching, 1911. Creator: Harris & Ewing
 
Boy Scouts - Visit of Sir Robert Baden-Powell To D.C. Making Fire, 1911. Creator: Harris & Ewing
 
Boy Scouts - Visit of Sir Robert Baden-Powell To D.C. Making Fire; Mrs. Taft Watching, 1911. Creator: Harris & Ewing
 
Army Aviation, College Park Aviation Field - Wright Brothers Plane, Wrecked, 1911. Creator: Harris & Ewing
 
U.S. Army - Motorized Anti-Aircraft Battery, 1910. Creator: Harris & Ewing
 
Paul Peck, Commercial Aviator - In Curtiss Type Plane; College Park, 1911. Creator: Harris & Ewing
 
Wright Brothers Airplane, Etc - Harry Atwood, 1911. Creator: Harris & Ewing
 
Aviator Harry Atwood, in Plane with Leo Stevens, 1911. Creator: Harris & Ewing
 
Wright Brothers Airplane, Etc - Harry Atwood, 1911. Creator: Harris & Ewing
 
Atwood, Harry. Aviator. Rising From White House Lawn In Wright Type B Plane, July, 1911. Creator: Harris & Ewing
 
Anthony Jannus, Flights And Tests of Rex Smith Plane Flown By Jannus - Flights of Plane, 1912. Creator: Harris & Ewing
 
Anthony Jannus, Flights And Tests of Rex Smith Plane Flown By Jannus - Flights of Plane, 1912. Creator: Harris & Ewing
 
Anthony Jannus, Flights And Tests of Rex Smith Plane Flown By Jannus - Flights of Plane, 1912. Creator: Harris & Ewing
 
Anthony Jannus, Flights And Tests of Rex Smith Plane Flown By Jannus - Flights of Plane, 1912. Creator: Harris & Ewing
 
Anthony Jannus, Flights And Tests of Rex Smith Plane Flown By Jannus - Flights of Plane, 1912. Creator: Harris & Ewing
 
Flights And Tests of Rex Smith Plane Flown By Anthony Jannus; in plane with Miss Laura Merriam, 1912 Creator: Harris & Ewing