46 
bridges to replace the present temporary wooden structures, erected 
five or six years ago, and now both unsightly and unsafe, an 
underground room at the south end of the conservatories for the 
storage of garden implements, and new entrance gates, to all of 
which attention has been called in: previous reports, will continue 
to be annual needs until they are supplied. 
Acknowledgments 
It is a pleasure to make grateful acknowledgment here of the 
numerous gifts, large and small, recorded in Appendix I (pp. 7 
81), and especially to express appreciation of the interest and con- 
fidence in our work of which these gifts are substantial evidence. 
Accompanying Papers 
The annual reports of heads of departments, financial state- 
ments, and Appendixes 1-6, including acknowledgment of gifts, 
publications and addresses of members of staff, a list of meetings 
held at the Garden by outside organizations, and the Agreement 
with the editorial board of Genetics concerning the publication of - 
that journal by the Garden, are appended as integral parts of this 
report. 
Respectfully submitted, 
C. Stuart GAGER, 
Director. 

REPORT OF THE CURATOR OF PLANTS AND PLAN- 
TATIONS FOR 192i 
Dr. C. Sruarr GAGER, DirEcror. 
Sir: I take pleasure in submitting herewith my report for the 
year ending December 31, 1921. 
General Maintenance and Construction Force 
Work began March 21 and ended December 3, the longest work- 
ing season for many years. During the busiest season of spring 
we employed an average of 19 laborers, while for the balance of 
