(344) 
500 others received too late for planting in the fall, were 
heeled in at the nursery and will be planted as early as 
possible in the spring. The bushes in the rose garden were 
thoroughly protected by hilling up the earth around them 
and by a mulch also, this precaution also being taken for 
the hybrid perpetuals, as many of them suffered severely 
during the winter of 1919-20. 
Investigations and Lectures 
I have continued my studies of horticultural botany and 
of the orchids, have acted as one of the editors of Addi- 
Sonia, my supervision of the drawings for that periodical 
being continued, and have given three of the lectures in 
the public courses at the museum and three in the courses 
at the central display greenhouse. 
Respectfully submitted, 
GeorceE V. Nasu, 
Head Gardener and Curator of Plantations. 
REPORT OF THE DIRECTOR OF THE LABORATORIES 
Dr. N. L. Britton, Drrecror-1n-CHIEF. 
Sir: I have the honor to present the following report for 
the year 1920. 
General Matters 
The laboratories have been maintained during the year 
in equipment and supplies as was necessary to meet the 
needs of members of the Staff and of the research students 
of the Garden. 
Use of an experimental greenhouse and of the breeding 
plots has been resumed during the past year on something 
like the pre-war basis. At the present time the breeding 
plot is being enlarged to give increased facilities and 
especially to provide for the growing of grapes. 
A beginning has been made in the establishment of a 
vineyard concerning which I have frequently consulted 
with you. It is planned to extend the planting of grapes 
to include as many as possible of the wild species and the 
