59 
Living Plants Distributed by Exchange 
During the past year 272 living plants were distributed to other 
institutions. 
Seed Distributed to Other Institutions 
On an exchange basis, 2,255 packets of seeds were distributed 
to other institutions. 
Seeds Received by Exchange 
On an exchange basis, 1,340 packets of seeds were received from 
other institutions. 
Seeds Collected 
By Dr. C. Stuart Gager, 19 packets collected in Canton, Me. 
By Mr. Montague Free, 12 packets from Ohiopyle, Penn. 
By Dr. Orland E. White, with the Mulford Biological Expedi- 
tion, I packet from Bolivia. 
Seeds Purchased 
Fifty-two packets of seeds were purchased during the year 1923. 
All gifts of living plants, seeds, cuttings, and herbarium speci- 
mens are listed under Appendix I. 
Personal Activities 
Part one of volume two of the Memoirs of the Garden, com- 
prising the first part of the results of my study of the vegetation 
of Long Island, was issued on June 11. Dealing particularly 
with Montauk, it comprises a study of the conflict between forest 
and grassland, which is there of peculiar intensity. The second 
‘section of “The Vegetation of Land Island,” which deals with 
the forests of the Island, is now in course of preparation. A 
factor directly affecting this is the great velocity of the wind 
blowing over certain parts of Long Island, the direct effects of 
which on transpiration and growth are not yet understood. Other 
than the work of Leonard Hill in England, and Briggs and 
Shantz in this country, almost nothing of an experimental nature 
has been done on the ecological effects of wind on transpiration 
