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 190; 



BY 



CHARLES M. MANLY 



Assistant in Charge of Experiments 



(PUBLICATION 1948) 



CITY OF WASHINGTON 

 PUBLISHED BY THE SMITHSONIAN INSTITUTION 



1911 



