THE SMITHSONIAN INSTITUTION 587 



been standard works of reference, and the continued demand for 

 them has necessitated several editions of each. " Smithsonian Mathe- 

 matical Formulae and Tables of Elliptic Functions " has recently 

 been added to this series. 



The Smithsonian publications, together counting a total of well 

 over 250,000 printed pages since 1846, are as follows: (1) Annual 

 Reports of the Board of Regents to Congress, containing every year 

 a general appendix composed of popular articles illustrating recent 

 progress in every branch of science and research; (2) Smithsonian 

 Contributions to Knowledge, extended memoirs in quarto form em- 

 bodying the results of important original research; (3) Smithsonian 

 Miscellaneous Collections, containing scientific papers on the most 

 diversified subjects, some of which have considerable popular in- 

 terest; (4) Annual Reports of the National Museum; (5) Bulletins 

 of the National Museum (including Contributions from the National 

 Herbarium), which contain accounts of original research by the staff 

 of the Museum or on the Museum collections; (6) Proceedings of 

 the National Museum, technical papers on the collections, and routine 

 scientific work of the Museum; (8) Annual Reports of the Bureau 

 of American Ethnology, which are enriched by accompanying papers 

 on ethnological and archeological subjects; (9) Bulletins of the 

 Bureau of American Ethnology, containing accounts of research by 

 members of the staff of the bureau on the customs, languages, and 

 archeology of the American Indians; (10) Annals of the Astro- 

 physical Observatory, which are extended accounts of the results 

 obtained from the original investigations of the Observatory; and 

 (II) Catalogues of Collections of the National Gallery of Art. 

 These various publications may be seen on the shelves of every im- 

 portant library in the world. 



LIBRARY 



Partly by purchase, but in the main by exchange for these pub- 

 lications, the Institution has assembled a library of over 900,000 

 volumes, principally of serial publications and the transactions of 

 learned societies, which is one of the notable collections of the world. 

 The major portion of it, now over 800,000 volumes, has been since 

 1866 deposited in the Library of Congress, with which establishment 

 the most cordial and mutually helpful relations exist. The re- 

 mainder, about 100,000 volumes, is kept at the Smithsonian and its 

 branches for easy reference. 



INTERNATIONAL EXCHANGES 



As another means of diffusing knowledge there was early estab- 

 lished the Bureau of International Exchanges, originally intended 

 simply for the proper distribution of the Smithsonian's publications, 

 but which gradually assumed very wide proportions, becoming no 



