338 Field Museum of Natural History — Reports, Vol. III. 



The library. — The Library now contains 50,639 volumes dis- 



tributed as follows: 



General library . . ' 35.038 



Anthropological library 2,136 



Botanical library 4,884 



Geological library 5,984 



Zoological library 1,894 



Library of Exposition Literature 703 



50.639 



The additions for the year consist of 3,152 books and pamphlets. 

 Including books received with collections, gratifying additions have 

 been made, though the continued source of growth is through ex- 

 changes, the publications received in this way being quite an element 

 in the library's accessions. During the year approximately 500 letters 

 have been written soliciting exchanges from contemporary societies 

 not on the exchange list. A number of favorable replies have already 

 been received and exchanges effected. The largest single acquisition 

 received was that which accompanied the Rothrock herbarium, 

 consisting of 342 books and 380 pamphlets. Many of the books 

 rilled gaps in the Museum collection, and where they duplicated, the 

 corresponding copy was placed in the Departmental library. The 

 Rothrock library is valuable in that it is representative of the botan- 

 ical activities of many years and contains volumes of rare works. It 

 is also interesting and significant to note that the price has advanced 

 over the original cost of many of the books in the collection from 

 fifty to seventy-five per cent. Other noteworthy acquisitions were 

 received from the following: Madame Leo Errera, Brussels; Mrs. 

 Henry Dibblee; Mr. Edward E. Ayer; Academie des Sciences de L'Em- 

 pereur Francois Joseph I, Prague; Botanic Gardens, Copenhagen; 

 Deutsch Natur. Medisin. Verein fur Bohm; K. Universitets Bibliotek, 

 Lund; Royal Botanic Gardens of Calcutta; Royal Gardens, Kew; 

 and Superintendent of Documents, Washington. Twenty-five vol- 

 umes of Linneana were loaned by the University of Chicago to the 

 Museum for use in the Department of Botany. Collaboration has 

 been rendered in the second edition of the Union List of Serials for 

 the libraries of Chicago, and 1,017 titles have been supplied. The 

 list in preparation is to be published by the John Crerar Library. 

 The first edition of this publication has proven of value both to the 

 staff and students generally. An earnest effort is being made to 

 dispose of the unaccessioned duplicate material now in the Library. 

 A list of this material was submitted to each Curator from which 



