76 ANNUAL, REPORT SMITHSONIAN INSTITUTION, 1909. 



The Present Status of Military Aeronautics. By Maj. George O. Squier, 

 U. S. Army. 



Aviation in France in 1908. By Pierre-Roger Jourdain. 



Wireless Telephony. By R. A. Fessenden. 



Phototelegraphy. By Henri Armagnat. 



The Gramophone and the Mechanical Recording and Reproduction of Musical 

 Sounds. By Lovell N. Reddie. 



On the Light Thrown by Recent Investigation on Electricity on the Relation 

 between Matter and Ether. By J. J. Thomson. 



Development of General and Physical Chemistry During the Last Forty Years. 

 By W. Nernst. 



Development of Technological Chemistry During the Last Forty Tears. By 

 O. N. Witt. 



Twenty Years' Progress in Explosives. By Oscar Guttmann. 



Recent Research in the Structure of the Universe. By J. C. Kapteyn. 



Solor Vortices and Magnetism in Sun Spots. By C. G. Abbot. 



Climatic Variations, Their Extent and Causes. By J. W. Gregory. 



Uranium and Geology. By John Joly. 



An Outline Review of the Geology of Peru. By George I. Adams. 



Our Present Knowledge of the Earth. By E. Wiechert. 



The Antarctic Question. By J. Machat. 



Some Geographical Aspects of the Nile. By Capt. H. G. Lyons. 



Heredity and the Origin of Species. By Daniel Trembly MacDougal. 



Cactaceae of Northeastern and Central Mexico, together with a Synopsis of 

 the Principal Mexican Genera. By William Edwin Safford. 



Angler Fishes, their Kinds and Ways. By Theodore Gill. 



The Birds of India. By Douglas Dewar. 



The Evolution of the Elephant. By Richard S. Lull. 



Excavations at Boghaz-Keui in the Summer of 1907. By Hugo Winckler and 

 O. Puchstein. 



Malaria in Greece. By Ronald Ross. 



Carl von Linne as a Geologist. By A. G. Nathorst. 



Life and Work of Lord Kelvin. By Sylvanus P. Thompson. 



The Work of Henri Becquerel. By Andre Broca. 



Owing to the unusual demand for the paper, there was published in March 

 a reprint of number 16S8, Parental Care among Fresh-water Fishes, by Theo- 

 dore Gill, which appeared originally in the Annual Report of the Board of 

 Regents for 1905. 



IV. SPECIAL PUBLICATIONS. 



Five special publications were issued during the year, as follows : 



1808. Catalogue of the Botanical Library of John Donnell Smith, presented in 

 1905 to the Smithsonian Institution. Compiled by Alice Cary Atwood. Im- 

 perial octavo. Pages 94. 



The catalogue was printed in an edition of 200 copies on Old Stratford paper, 

 imperial octavo size, from the original stereotype plates used in its first publi- 

 cation by the National Museum as Part I of Volume XII of Contributions from 

 the National Herbarium. 



1809. Researches and Experiments in Aerial Navigation. By S. P. Langley. 

 Reprinted from the Smithsonian Reports for 1897, pages 169-181, with 1 plate; 

 1900, pages 197-216, with 6 plates; 1901, pages 649-659, with 7 plates; 1904, 

 pages 113-125, with 1 plate. Octavo. 



The occasion for this reprint of Mr. Langley's papers, which was issued in 

 August, is stated in the inti - oduction. The articles were as follows: 



