REPORT OF THE LIBRARIAN. 



V. REPORT OF THE LIBRARIAN. 



The Library has continued to make a satisfactory growth. 

 The total accessions during the year, not counting periodicals 

 received in parts, were 795 items, of which 175 were received by 

 purchase, 93 by binding, and 514 by gift and exchange. After 

 deducting 13 duplicate volumes removed from the collection, 

 the net increase was 408 volumes and 387 pamphlets, making 

 the total contents of the library on December 31, 1920, 10,243 

 volumes and 8,532 pamphlets. 



The current periodicals and other serial publications, received 

 during the year, comprised 153 titles, of these 83 were received 

 by subscription, 38 in exchange for the BIOLOGICAL BULLETIN, 

 and 32 were gifts. The list of periodicals was increased over the 

 previous year by the addition of 21 titles. 



The appropriation of part of the reserve Library Fund made 

 it possible to fill up the gaps in the sets of German periodicals 

 occasioned by the interruption of communication during the 

 war, and also to complete the sets of a number of important 

 journals. As the result of much labor and correspondence the 

 following sets were completed: Archiv fur mikroscopische Anato- 

 mic (except 2 vols.), Archives de Biologic, Biochemical Journal, 

 Botanical Abstracts, Journal of the New York Botanical Garden, 

 Journal of the Royal Microscopical Society, New Phytologist 

 (except i vol.), Parasitology. 



There are still many important sets of journals in the library 

 that are incomplete. And one of the pressing needs of the 

 Laboratory is funds with which to purchase the volumes neces- 

 sary to complete them. 



During the summer the library was in constant use by officers 

 and students of the Laboratory and much of the time of the 

 Assistant Librarian was taken up with assisting readers and 

 attending to the circulation of books. About 1,000 books and 

 periodicals were lent for use outside of the Library. 



When the collection was small, the arrangement of the books 

 and pamphlets was a simple matter, and there was little need 

 of a catalogue, except as a matter of record. The collection has 



