22 ANNUAL EEPORT SMITHSONIAN INSTITUTION, 1916. 



Graham Bell, consisting of 33 books and 37 portfolios of periodicals, 

 and by a number of reference works from the library of Major 

 Baden-Powell. 



The National Museum library received 4,840 accessions, among 

 them 207 titles contributed by Dr. William Healey Dall to his col- 

 lection of works relating to mollusks; and the scientific library of 

 Dr. Theodore Nicholas Gill, numbering about 3,000 volumes, pre- 

 sented to the Institution by his brother, Mr. Herbert A. Gill, which 

 is a valuable addition to the natural history series, especially in 

 ichthyology. 



INTERNATIONAL CONGRESSES AND EXPOSITIONS. 

 SECOND PAN AMERICAN SCIENTIFIC CONGRESS. 



The Second Pan American Scientific Congress, which held its ses- 

 sions in Washington from December 27, 1915, to January 8, 1916, 

 was the fifth of a series of scientific congresses, the first three of 

 which included only the Latin American countries. At the first 

 strictly Pan American Congress, held in Peru in 1908, in which the 

 United States was invited to participate, it was unanimously voted 

 to hold the next meeting in Washington. The congress held its 

 inaugural session at 10 a. m., December 27, at Memorial Continental 

 Hall, and business sessions and social affairs were arranged for every 

 day thereafter until January 8. The following are the sections into 

 which the congress was divided: 



I. Anthropology. 



II. Astronomy, Meteorologj% and Seismology. 



III. Conservation of Natural Resources, Agriculture, Irrigation, and Forestry. 



IV. Education. 



V. Engineering. 



Yl. International Law, Public Law, and Jurisprudence. 



VII. Mining and Jletallurgy, Economic Geology, and Applied Chemistry. 



VIII. Public Health and Medical Science. 



IX. Transportation, Commerce, Finance, and Taxation. 



At the meetings of these sections a great number of papers of 

 scientific and economic importance were read. 



The Institution proper was represented in the congress by your 

 secretary and Prof. W. H. Holmes, head curator of anthropology, 

 United States National Museum, as delegates. Of the branches of 

 the Institution, the Bureau of American Ethnology was represented 

 by the ethnologist in charge, Mr. F. W. Hodge, and Dr. J. W. 

 Fewkes, delegates; and the Astrophysical Observatory by Dr. C. G. 

 Abbot, delegate, and Mr. F. E. Fowle, alternate. A reception was 

 held for the Latin American delegates by the Board of Regents and 



