(133) 
research, and the accumulation of bibliographic memoranda 
for ready reference, have continued to occupy a consider- 
able part of the Bibliographer’s time. 
Comparatively few books have been purchased for the 
library during the year, and if the efficiency which has 
hitherto characterized the collections is to be maintained, 
it will be necessary eventually to expend considerable 
sums to make up for the inactivity of the last few years. 
Three parts of North American Flora, aggregating 288 
pages, have been issued during the year: Volume 9, Part 4, 
in April, Volume 34, Part 2, in July, and Volume 17, Part 3, 
in December. Two other parts are in press. 
The Bibliographer has given two lectures in the public 
courses of the Garden, and presented a paper in connection 
with the Twentieth Anniversary Celebration in September; 
he also took charge of the registration of visiting botanists 
during the celebration. 
Respectfully submitted, 
oHN HenpLey BARNHART, 
Bibliographer. 
REPORT OF THE LIBRARIAN 
Dr. N. L. Britton, Drrecror-1n-Cuier. 
Sir: I have the honor to submit the following report for 
the year 1915. 
According to a census of the library taken at the end of 
the year, the number of bound volumes was found to be 
27,224, an increase of 925 volumes since the report for 1914. 
During the year 573 books have been bound, including 
43 which are the property of Columbia University. 
Among the accessions are 191 books acquired by pur- 
chase, and 47 by exchange and deposit. The gifts include 
the books on botany from the library of the late Judge 
Addison Brown, a list of which may be found in the June 
number of the Journal. 
In February, a typewriter was purchased for the library. 
The use of this has greatly facilitated the work of cataloguing 
