(358) 
The collection of lantern slides has been increased by the 
purchase of 116 colored and 31 uncolored slides, by the 
gift of 26 colored slides, and by exchange of 6 uncolored 
ones. Only eight negatives have been added to the col- 
lection. 
Acting as secretary for the Stokes’ Fund and the Wild 
Flower Preservation Society I have answered letters, 
distributed literature, and given several lectures to garden 
clubs in the vicinity of New York. 
Respectfully submitted, 
EvizasetH G. Britton, 
Honorary Curator. 
REPORT OF THE HONORARY CURATOR OF FOSSIL PLANTS 
Dr. N. L. Brirron, Drrector-1In-CHIEF. 
Sir: I have the honor to report as follows on work in 
connection with paleobotany at the Garden during the 
year 1920: 
From January 1 to July 15 I was in Washington, D. C., 
continuing my studies of the fossil flora of Alaska for the 
U. S. Geological Survey. During the remainder of the 
year I was in attendance at the Garden regularly one day 
each week and on other days when circumstances permitted. 
Work on the collections of fossil plants recently obtained 
in Cuba and Porto Rico was prosecuted; preliminary 
examinations were made of all accessions and the speci- 
mens suitably labeled. 
Systematic effort was maintained, through correspond- 
ence and exchange of publications, to add to the paleo- 
botanical library and to secure all available recent litera- 
ture on the subject—war conditions, past and present, 
having seriously interfered with the receipt of publications 
for several years. About thirty titles, by fifteen different 
authors, were thus secured and added to the library. 
Two small but relatively important accessions to the 
paleobotanical collections may be specially mentioned, 
