30 REPORT OF NATIONAL MUSEUM, 1919. 



bibliography at the end of this report. A brief guide to the Arts 

 and Industries and History Building was also issued. 



The distribution of volumes and separates to libraries and indi- 

 viduals on the regular mailing lists aggregated 103,870 copies, in 

 addition to which some 14,456 copies of the publications of last and 

 previous years were supplied in response to special applications. 



In addition to the Museum publications, many contributions based 

 on material in its collections were printed by other bureaus of the 

 Government and by private institutions, all of which are cited in 

 the bibliography. Those issued by the Smithsonian Institution com- 

 prise the following, which appeared in the Miscellaneous Collections : 

 " The mosses collected by the Smithsonian African Expedition, 

 1909-10.'' and " Uganda mosses collected by R. Diimmer and others," 

 by H. N. Dixon; "Cambrian geology and paleontology, IV, No. 4, 

 Appendages of trilobites," by Charles D. Walcott; "Begoniaceae 

 Centrali-Americanae et Ecuadorenses," by Casimir de Candolle; 

 "A Lower Cambrian edrioasterid, Stromatocystites walcotti," by 

 Charles Schuchert, and " Explorations and field-work of the Smith- 

 sonian Institution in 1918." 



The editorial office, besides supervising the printing of the Museum 

 publications, also has charge of all miscellaneous printing and bind- 

 ing. 



LIBRARY. 



The library of the Museum, assembled with reference to the work- 

 ing up of the collections, embraces a wide range of subjects in the 

 sciences and arts. The main library is housed in the Natural History 

 Building, while the publications on the useful arts are provided for 

 in the Arts and Industries Building. Moreover, each of the divisions 

 and the principal offices of the Museum has its own sectional library, 

 consisting of the books relating wholly to its subject; these are with- 

 drawn from the main branches and so distributed in order to facili- 

 tate the progi'ess of work. The use of the library and its sections 

 is not, however, restricted to members of the Museum staff, but is 

 extended to all properly qualified persons, a privilege extensively 

 availed of by the workers in other Government scientific bureaus 

 and similar establishments in Washington. 



During the year the library was increased by 2,172 volumes and 

 2,614 pamphlets and unbound papers, most of which were obtained 

 by gift or exchange. Two hundred and eighty-seven books were 

 purchased and 106 periodicals secured by subscription. There are 

 now in the library 141,794 books, consisting of 54,685 volumes and 

 87,109 pamphlets and unbound papers. 



The most important acquisition was a set of catalogues of the 

 art collection of J. Pierpont IMorgan, which was presented to the 



