Trial of full-size Langley Aerodrome, 8th December, 1903. Langley Memoir on Mechanical Flight, Smithsonian Institution, Washington. Frontispiece. A History of Aeronautics by E. CHARLES VIVIAN WITH A SECTION ON PROGRESS IN AEROPLANE DESIGN by LIEUT.-COL. W. LOCKWOOD MARSH, O.B.E. NEW YORK |