82 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1907. 
being added to the receipts, while about 600 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In the reading room there were withdrawn 40 bound volumes of periodicals 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. ©. 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 S. 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 
Chaussées, 1831-1833, 152 volumes; Annales de Chimie, 1789-1815, 97 volumes, 
and Annales de Chimie et de Physique, 1816-1872, 189 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 assistant 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- 
