REFERENCES

Alexander Graham Bell, Experiments in Mechanical Flight, Nature, May 28, 1896.

Alexander Graham Bell, The Pioneer Aerial Flight, Scientific American, Supplement, Feb. 26, 1910.

S. P. Langley, Experiments in Aerodynamics.

S. P. Langley, The "Flying Machine," McClure's, June, 1897 (illustrated).

Langley Memoir on Mechanical Flight, Smithsonian Contributions to Knowledge, vol. 27, no. 3 (illustrated).

Scientific American, Jan. 13, 1912, A Memorial Honor to a Pioneer Inventor.

The Smithsonian Institution 1846-1896. The History of its First Half-Century, edited by G. B. Goode.

A. F. Zahm, The First Man-carrying Aeroplane capable of Sustained Free Flight, Annual Report of the Smithsonian Institution, 1914 (illustrated).