REPORT OF THE SECRETARY. 



103 



As will be seen by the figures below, the library's allotment for bind- 

 ing has not kept pace with the increases in cost. As a consequence 

 the number of books sent to the Government bindery has been 

 steadily decreasing. Following are the number sent during the past 

 three fiscal years : 



1918 1,706 



1919 1, 322 



1920 737 



With a constantly increasing supply of volumes and many pub- 

 lications received during the present and past fiscal years still un- 

 bound, the library is greatly handicapped and is unable to render 

 the service that it should. 



Technological series. — Additions to the technological library dur- 

 ing the year, exclusive of duplicates, number 200 bound volumes, 

 2,983 pamphlets, and 2,576 periodicals; 2,245 cards have been added 

 to the scientific depository catalogue. A special effort has been made 

 to complete the files of publications, especially United States Govern- 

 ment documents. The books and periodicals loaned during the year 

 were 200. 



Sectional libraries. — Following is a complete list of sectional 

 libraries : 



Administration. 



Administrative assistant's oflice. 



Anthropology. 



Biology. 



Birds. 



Botany. 



Comparative anatomy. 



Editoi"'s oflice. 



Ethnology. 



Invertebrate paleontology. 



Mammals. 



Marine invertebrates. 

 Materia medica. 

 Mechanical technology. 

 Mesozoic fossils. 

 Minerals. 



Physical anthropology. 

 Prehistoric archeology. 

 Property clerk. 

 Registrar's office. 

 Reptiles and batrachlans. 

 Superintendent's oflice. 



BUREAU OF AMERICAN ETHNOLOGY LIBRARY. 



A report of the operations of the library of the Bureau of Ameri- 

 can Ethnology will be found in the report of that bureau. This 

 library is administered under the direct care of the chief of the 



bureau. 



ASTROPHYSICAL OBSERVATORY LIBRARY. 



Further additions to the library of the Astrophysical Observatory 

 number 87 volumes, 10 parts of volumes, and 16 pamphlets, 



NATIONAL ZOOLOGICAL PARK LIBRARY. 



To the National Zoological Park library there were added six 

 volumes and two pamphlets. 



