118 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1923 



It will be seen that the use of the library can not be estimated upon 

 the basis of its loans alone. Many volumes are consulted in the 

 general library, the technological library, and the various sectional 

 libraries without being taken out. References are frequently re- 

 quested over the telephone by members of the staff of the Museum 

 and other Government bureaus, and every effort is made to comply 

 with these requests. Of the 9,220 loans made during the year, 5,191 

 were to the sectional libraries and 1,929 were borrowed from other 

 libraries. 



The subject catalogue of the library has been increased by 4,400 

 cards. The arrangement of accumulated cards from the Concilium 

 Bibliographicum, received since the close of the war, has been 

 progressing and is well under way. 



ASTROPHYSICAL OBSERVATORY LIBRARY 



The requirements of the staff of the Astrophysical Observatory, 

 both in Washington and at the various stations, in the way of ref- 

 erence service, are met through the Astrophysical Observatory 

 Library. Loans are made through the Smithsonian Office Library. 

 There were added during the year 113 volumes, 27 parts of volumes, 

 and 54 pamphlets. 



BUREAU OF AMERICAN ETHNOLOGY LIBRARY 



The activities of the Bureau of American Ethnology Library are 

 covered in the report of the chief of that bureau. The library is 

 administered under his immediate direction. 



NATIONAL ZOOLOGICAL PARK LIBRARY 



The library of the National Zoological Park, located three miles 

 distant from the Smithsonian building, contains supplemental ma- 

 terial of importance in the fields of zoology and park administration. 

 The increase for the year, as shown by accessions, was six volumes 

 and four parts. 



NATIONAL GALLERY OF ART LIBRARY 



The National Gallery of Art Library is rapidly growing. Since 

 the gallery has begun the issuance of a separate series of publications 

 there has been a noteworthy increase in the material that has been 

 received in exchange. There were accessioned 128 volumes and 213 

 periodicals. Periodical parts numbered 740. The gift of the year 

 most worthy of mention is the large, handsomely illustrated volume 

 of paintings in the Bachstitz Gallery at The Hague. 



