LANGLEY MEMOIR ON MECHANICAL FLIGHT

PART I. 1887 TO 1896

BY SAMUEL PIERPONT LANGLEY EDITED BY CHARLES M. MANLY

PART II. 1897 TO 1903

BY CHARLES M. MANLY Assistant in Charge of Experiments

(PUBLICATION 1948)

CITY OF WASHINGTON PUBLISHED BY THE SMITHSONIAN INSTITUTION 1911

Commission to whom this Memoir

has been referred:

OTTO HILGARD TITTMAN,

GEORGE OWEN SQUIER,

ALBERT FRANCIS ZAHM.

The Lord Baltimore Press BALTIMORE, MD., U. S. A.