92 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1919. 
jr. The set numbers 29 volumes, many of them privately printed in 
numbered editions. Acknowledgment is due the University of Michi- 
gan for the gift of the 12 volumes published of the Humanistic Series. 
The accessions were further increased by transfers from the 
Hj^gienic Laboratory, and contributions from Mr. B, H. Swales, the 
estate of Dr. Richard Rathbun, Dr. C. D. Walcott, Mr. William 
Schaus, Dr. O. P. Hay, Dr. C. W. Richmond, Dr. W. H. Dall, Dr. 
Mary J. Rathbun, Mr. A. H. Clark, Mr. W. R. Maxon, and others. 
There were accessioned during the year 2,172 volumes, 2,585 pam- 
phlets, 29 parts of volumes. The number of books in the library 
now is 141,794, consisting of 54,685 volumes and 87,109 pamphlets and 
unbound papers. 
Technological series. — Additions to the technological library num- 
ber 346 volumes, 4,096 parts of volumes, and 750 pamphlets. Current 
periodicals entered and shelved number 56 volumes and 3,091 parts 
of volumes. The back file of periodicals in the stacks have been 
examined and recorded from earliest issued to date. Entry was made 
for 4,249 volumes and 6,172 parts of volumes not entered before in 
the periodical record. The record of all periodicals is now complete 
and will be kept up to date for reference and consultation ; 885 cards 
were added to the catalogue, 362 being for new material and the 
remainder of class 500. 
In the scientific depository catalogue 10,230 cards were received, 
arranged, and filed. Of these 3,032 were main author cards, subject 
headings and titles being added for 7,198 additional cards in accord- 
ance with the plan of a dictionary catalogue. 
The books and periodicals loaned during the year number 121 
volumes, 21 pamphlets, and 104 periodicals or parts of volumes, 
making a total circulation of 245. 
Sectional library^ Divisio7i of Plants. — The revision of the books, 
serials, and periodicals in the Division of Plants has been satisfac- 
torily completed. A card catalogue has been made of all of the 
books in the sectional library, numbering 896 titles, or 1,308 volumes. 
A periodica,! card record has been made for the recording of all 
volumes and parts of volumes now in the section, and current num- 
bers are to be entered as received. The total number of publications 
thus recorded is 781 volumes and 153 parts of volumes. All com- 
pleted volumes of unbound periodicals, numbering 38, have been 
collated and sent to the bindery. 
In the course of revision, 104 volumes were transferred from the 
main library to the sectional library, inasmuch as they proved to be 
of special value to the division, and 64 volumes of lesser direct bear- 
ing on the division's work were transferred to the stacks of the main 
library; 510 volumes of the recent Biltmore acquisition were re- 
