REPORT OF THE SECRETARY 147 



being conducted by the Institution. It has 4,188 vohimes and 3,192 

 pamphlets. The additions during the year were 180 volumes and 92 

 pamplilets. The number of volumes bound was 127. 



RADIATION AND ORGANISMS LIBRARY 



The library of radiation and organisms is a small, highly special- 

 ized collection pertaining to one of the newer interests of the 

 Institution, for the furthering of which it recently organized a 

 division. During 1930 publications bearing mainly on this interest 

 to the number of 20 volumes, 1 pamphlet, and several periodicals 

 were added, bringing the collection to 94 volumes, 9 pam])hlets, and 

 6 charts. Space and equipment, adequate for some years to come, 

 were provided for the library in the north tower of the Smithsonian 

 Building. 



LANGLEY AERONAUTICAL LIBRARY 



The Smithsonian's well-known collection of aeronautical publica- 

 tions is now deposited in the Library of Congress, where, under its 

 own stamp and bookplate, it occupies a unique place in the division 

 of aeronautics and is even more available as an aid in research than 

 it was before 1930, when it was transferred from the Institution. It 

 will continue to bear the name of the Langley Aeronautical Library, 

 in memory of Samuel Pierpont Langley, who while Secretary of the 

 Smithsonian made a notable contribution to the science of aero- 

 nautics. Most of the collection once belonged to Doctor Langley, and 

 to other experimenters associated with him, including Alexander 

 Graham Bell, Octave Chanute, and James Means. The rest of it has 

 been received from time to time by the Institution chiefly in exchange 

 for its publications. The library contains 1,856 volumes and 1,056 

 pamphlets. Among its items are sets, including most of the early 

 numbers, of the aeronautical magazines, both American and foreign, 

 and many other important publications, some of which are very rare, 

 together with files of photographs, letters, and newspaper clippings. 



During the fiscal year just closed the Smithsonian library was in- 

 strumental in increasing the Langley collection by 45 per cent more 

 than in 1930, or by 122 volumes, 445 parts of volumes, and 133 

 pamphlets. Most of these were obtained by exchange. In this con- 

 nection it may be added that the library, cooperating with the divi- 

 sion of aeronautics in the Library of Congress, entered into exchange 

 relations, on behalf of the Langley collection, with 50 or more new 

 aeronautical societies and institutions, and received in response to its 

 special requests many publications. It is hoped that this service on 

 the part of the Smithsonian library can be considerably enlarged in 

 the near future. 



10295)2—32 11 



