LIBRARY. 433 



In view of the fa<'t tliat the library's hook fund has not been in- 

 creas(^d in the hist four years, it is especially gratifying; that there 

 has been a considerable increase in the number of ])ooks and ])eri- 

 odi'-als which have been received by gift. To the individuals, insti- 

 tutions, societies, and ])ublishers who have contributed to[]^,tho 

 library's resources, grateful acknowledgment is hereby made. 



CATALOGUING AND CLASSIFICATION. 



The record of the material catalogued and classified during the year 

 is as follows: 2,757 volumes, 699 pam])hlets, 6,110 serials and con- 

 tinuations, and 27 maps and charts, making a total of 9,59.3, an in- 

 crease of 3,548 as com]>ared with the ]>revious year. In addition to. 

 the complete cataloguing of the above-mentioned items, author cards 

 were made for 501 pamphlets of less im])ortance, and 1,937 reprints. 

 There were added to the main di'^-tionarv catalogue 21,504 cards, and 

 2,353 were withdrawn, making a net addition of 19,151, an iwrease 

 of .'-588 as comi)ared with the ])revious year. The main catalogue now 

 contains approximately 430,000 cards. 



The number of titles prepared during the year for ]>rinting by the 

 Library of Congress in what is known as the ''Agr'' series are as 

 follows: Cards for accessions, 817; cards for department ])ublica- 

 tions, 611; total, 1,438, an increase of 270 over the previous year. 

 The total number of titles ]"»repared by the library since 1902, in 

 which year the ])rinting of the cards was begun, now amounts ta 

 32.968.' 



The amount of un'-atalogued material on hand July 1, 1920, was 

 as follows: 274 volumes, 599 pamphlets, 540 continuations, and 7 

 ma])s, a decrease of 545 pieces over the ])re\'iou3 year. 



PERIODICAL DIVISION. 



Miss Lydia K. Wilkins, Chief. 



The total number of difTerent periodicals, exclusive of annuals 

 and serials of infrecpuuit issue, re^'cived currently by the library dur- 

 ing the year was 2,757 titles, of which 640 were received by ])urchase 

 and 2,117 by gift. The number of new periodicals added during the 

 year was 346. whereas 82 of those listed last >'ear an^ no longer re- 

 ceived, either bcause they have <'eased ])ublication permanently 

 or temporarily, or because the subscriptions have been dis'^'ontinued. 

 The net increase for the year was 264. In order to meet the demanda 

 for (•(>rtain tx-riodi'-als, it is ncessary to ])urchase 207 du]>licates. 

 making the total number of ])eriodi<'als i:)urchased 847, a net in-rease 

 of 17 over the ])revious year. The library also received 583 dupli- 

 cates by gift and exchange, making the total number of ]i(M'iodicals 

 handled currently during the year 3,547, an in-rease of 101 for the 

 year. The following table shows the various foreign countries from 

 which perioili-als are currently received and the number received 

 from ea'-h country, as compared with the number received in 1918, 

 when this list was first comi)iled: 



