CONTENTS. 



Advertisement iii 



Lis! of < (fficers, Members, and Regents viii 



Article I (801). Experiments in Aeroctynamics. By S. P. Langley. Published 1891. 

 4to, ii. 115 pp., 10 plates. 



Article II (884). The Internal Work of the Wind. By S. P. Langley. Publis 



1893. 4to, iii. 24 pp., 5 plates. Reprinted 1908, with appendix pp. 25-35 

 from French edition of 1893. 



Article III (1948). Langley Memoir on Mechanical Flight. Part I, 1887 to L896 



Samuel Pierpoxt Langley, edited by Charles M. Manly. Part IT. 189 1 ! 

 to 1903. by Charles M. Manly. Published 1911. 4to, xi, 320 pp., 101 



plates. 



XI 



