82 REPORT OF THE SECRETARY. 



being added to the receipts, while about GOO defective series were partly or 

 entirely completed. In addition to the letters referred to, 85 postal cards were 

 sent and about 60 missing parts received in response. 



The plan adopted by the International Catalogue of Scientific Literature of 

 sending to authors lists of their scientific writings that have been indexed in 

 the Catalogue, and requesting any that have not been cited, has been continued, 

 with the result that nearly 500 authors' separates have been received, which 

 will ultimately come to the library. 



In the reading room there were withdrawn 40 bound volumes of periodicals 

 and 3,485 parts of scientific periodicals and popular magazines, making a total 

 of 3,525. The use of these publications, and those in the sectional libraries of 

 the Institution, by persons from various bureaus of the Government has con- 

 tinued, but in the main the consultation has been by members of the staff. 



The mail receipts numbered 34,500 packages, the publications contained 

 therein being stamped and distributed for entry from the mail desk. About 

 5,000 acknowledgments were made on the regular form in addition to those 

 for publications received in response to the requests of the Institution for 

 exchange. 



As the books formerly in the Secretary's library will no longer be kept 

 separate from the general library, one change may be noted in the number of 

 sectional libraries maintained in the Institution, there now being the office 

 library and the employees' library, together with those of the Astrophysical 

 Observatory, aerodromics, international exchanges, and law reference. 



The employees' library. — The books added to the library numbered 40, 27 of 

 which were presented by Mr. C. L. Pollard, and 80 volumes of magazines were 

 bound. The number of books borrowed was 2,620, and the sending of a selected 

 number of the books from this library to the National Zoological Park and the 

 Bureau of American Ethnology each month has been continued. 



The estate of 8. P. Langley. — The estate of S. P. Langley turned over to the 

 Institution his scientific library. These books have been stamped, entered, and 

 placed in the divisions to which they relate. 



The Watts de Peyster collection. — Gen. John Watts de Peyster continued, up 

 to the time of his death, May 4, 1907, to present books relating to Napoleon 

 Buonaparte and his time, together with volumes on other subjects for the Watts 

 de Peyster collection in the Institution. There were received from this source 

 during the year 288 volumes. 



The art room. — The work of cataloguing the Marsh collection is progressing, 

 and during the year 115 prints have been identified and cards made for them 

 giving full information as to the engraver, the subject, the manner of execution, 

 and the size of the print and plate. 



Another important addition to the library was the receipt of three important 

 series of publications from the Light-House Board ; Annales des^ Ponts et 

 Chaussees, 1831-1833, 152 volumes; Annales de Chimie, 1789-1815, 97 volumes, 

 and Annales de Chimie et de Physique, 1816-1872, 139 volumes, which are a 

 permanent transfer to the Institution. 



In addition to the regular work in the library a partial bibliography of 

 aeronautical literature, which included the papers by Langley, Chanute, Lilien- 

 thal, Herring, and Hargrave, and a bibliography of the writings of Dr. S. P. 

 Langley were prepared for publication by the assistaat librarian, Mr. Paul 

 Brockett. 



THE MUSEUM LIBRARY. 



The Museum library has been fortunate in continuing to receive from Prof. 

 O. T. Mason, Dr. W. L. Ralph, and Dr. C. A. White many scientific publications 

 of importance in completing the sets and series in the Museum. Dr. C. W. Rich- 



