REPORT OF THE SECRETARY. 85 



1890. Wireless Telephony. By R. A. Fessenden. Pages 161-195, with 20 plates. 



1891. Phototelegraphy. By Henri Armagnat. Pages 197-207. 



1892. The Gramophone and the Mechanical Recording and Reproduction of 

 Musical Sounds. By Lovell W. Reddie. Pages 209 to 231, with 2 plates. 



1893. On the Light Thrown by Recent Investigation on Electricity on the Rela- 

 tion between Matter and Ether. By J. J. Thomson. Pages 233-244. 



1894. Development of General and Physical Chemistry During the Last Forty 

 Tears. By W. Nernst. Pages 245-253. 



1895. Development of Technological Chemistry During the Last Forty Years. 

 By O. H. Witt. Pages 255-262. 



1896. Twenty Years' Progress in Explosives. By Oscar Guttmann. Pages 263- 

 300, with 9 plates. 



1897. Recent Research in the Structure of the Universe. By J. C. Kapteyn. 

 Pages 301-319. 



1898. Solar Vortices and Magnetism in Sun Spots. By C. G. Abbot. Pages 321- 

 338, with 5 plates. 



1899. Climatic Variations : Their Extent and Causes. By J. W. Gregory. Pages 

 339-354. 



1900. Uranium and Geology. By Prof. John Joly. Pages 355-384, with 1 plate. 



1901. An Outline Review of the Geology of Peru. By George I. Adams. Pages 

 385^30, with 5 plates. 



1902. Our Present Knowledge of the Earth. By E. Wiechert. Pages 431-449. 



1903. The Antarctic Question — Voyages to the South Pole since 1898. By J. 

 Machat. Pages 451^180, with 1 plate. 



1904. Some Geographical Aspects of the Nile. By Capt. H. G. Lyons. Pages 

 481-503, with 5 plates. 



1905. Heredity, and the Origin of Species. By Daniel Trembly MacDougal. 

 Pages 505-523, with 1 plate. 



1906. Cactacese of Northeastern and Central Mexico, together with a Synopsis 

 of the Principal Mexican Genera. By William Edwin Safford. Pages 525- 

 563, with 15 plates. (A separate edition with index was also published.) 



1907. Angler Fishes: Their Kinds and Ways. By Theodore Gill. Pages 565- 

 615. 



1908. The Birds of India. By Douglas Dewar. Pages 617-639. 



1909. The Evolution of the Elephant. By Richard S. Lull. Pages 641-675, with 

 2 plates. 



1910. Excavations at Boghaz-Keui in the Summer of 1907. By Hugo Winckler 

 and O. Puchstein. Pages 677-696, with 10 plates. 



1911. Malaria in Greece. By Ronald Ross. Pages 697-710. 



1912. Carl von Linne as a Geologist. By A. G. Nathorst. Pages 711-743. 



1913. Life and Work of Lord Kelvin. The Kelvin Lecture. By Sylvanus P. 

 Thompson. Pages 745-768, with 1 plate. 



1914. The Work of Henri Becquerel. By Andre Broca. Pages 769-7S5, with 1 

 plate. 



The report of the executive committee and Proceedings of the Board of 

 Regents of the Institution, as well as the report of the Secretary, for the fiscal 

 year ending June 30, 1909, both forming part of the annual report of the Board 

 of Regents to Congress, was printed in pamphlet form and published at the 

 December meeting of the Board of Regents, as follows : 



1915. Report of the Secretary of the Smithsonian Institution for the year 

 ending June 30, 1909. Pages iii, 95. 



1916. Report of the Executive Committee and Proceedings of the Board of 

 Regents for the year ending June 30, 1909. Pages 19. 



