SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGE 



volume 27 number 3 



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 



