44 SMITHSONIAN MISCELLANEOUS COLLECTIONS. 



1890. On the Cheapest Form of Light. By S. P. Langley and F. W. Very. 

 American Journal of Science, New Haven, August, 1890, vol. xl, pp. 

 97-113, pis. 3. 



1890. On the Cheapest Form of Light. From the American Journal of Sci- 



ence, New Haven, 1890, vol. xl, pp. 97-ii3> pls- 3- 



1891. Locomotion Aeriene — Recherches experimentales aerodynamiques et 



donnees d'experience. Note de M. S. P. Langley. Comptes Rendus 

 Academic des Sciences, Paris, 1891, vol. 113, pp. 59-63. 



1891. Recherches experimentales aerodynamiques et donnees d'experience. 

 (Separate.) Comptes Rendus x\cademie des Sciences, Paris, 1891, 

 vol. 113, pp. 1-5- 



1891. Experiments in Aerodynamics. Smithsonian Contributions to Knowl- 

 edge, Washington, 1891, vol. xxvii, pp. 1-115, pis. 10. 



1891. The Possibility of Mechanical Flight. The Century, New York, Sep- 

 tember, 1891, vol. xLii, No. 5, pp. 783-785- 



1891. Experiences d'Aerodynamiques, par M. S. P. Langley, Traduction libre 

 et notes. Par M. Lauriol. Revue de TAeronautique Theorique et Ap- 

 pliquee, 4^ Annee, 3^ et 4^ Livraisons, Paris, 1891, pp. T]-\Z'^, pis. 6. 



1891. Smithsonian Standards for Physical Apparatus. Nature, London, vol. 

 45, No. 1 157, P- 197- 



1891. Address of S. P. Langley, LL. D., Vice-President of the Congress, pre- 



siding at the session on the afternoon of April 9th, 1891. Proceedings 

 and Addresses. Celebration of the Beginning of the Second Century 

 of the American Patent System, at Washington City, D. C, April 8, 9, 

 ID, 1891, Washington, 1892, pp. 22,^-22,7. 



1892. Address. Celebration of the Beginning of the Second Century of the 



American Patent System at Washington, D. C, April 8, 9, 10, 1891. 

 Proceedings of the Congress, Washington, 1892, pp. 235-237. 



1892. Mechanical Flight. The Cosmopolitan, New York, May, 1892, pp. 55-58. 



1893. The Internal Work of the Wind. Smithsonian Contributions to Knowl- 



edge, Washington, pp. 1-23, pis. 5. 

 1893. Le Travail Interieur du Vent. Revue de I'Aeronautique Theorique et 



Appliquee, 6e Annee, 3^ Livraison, Paris, 1893, pp. 37-68, pis. 5. 

 1893. The Meteorological Work of the Smithsonian Institution. Papers of 



the Chicago Meteorological Congress. August, 1893, pp. 1-5. 



1893. The Meteorological Work of the Smithsonian Institution. Extract 



from the papers of the Chicago Meteorological Congress, August, 

 1893, pp. 1-5. 



1894. The Internal Work of the Wind. American Journal of Science, New 



Haven, 1894. vol. xlvii, pp. 41-63, pis. 5. 



1894. The Internal Work of the Wind. From the American Journal of Sci- 

 ence, New Haven, 1894, vol. xlvii, pp. 41-63, pis. 5. 



1894. Mr. Langley's Recent Progress in Bolometer Work at the Smithsonian 

 Astrophysical Observatory. Astronomy and Astro-physics, Chicago, 

 January, 1894, pp. 41-44. 



1894. The Meteorological Work of the Smithsonian Institution. Prepared for 

 the Chicago Congress of Meteorology. Abstract, American Meteor- 

 ological Journal, Boston. January, 1894, pp. 373-375. 



1894. On the recent solar spectrum work at the Smithsonian Observatory. 

 Memorie della Societa degli spettroscopisti Italiani, Rome, 1894, vol. 

 23, pp. 127-136. 



