4 - 
and prepared a paper on the group* Mr. Holt turn 
also prepared for publication an account of 
his observations on the periodic behaviour 
of trees in Singapore, and continued his 
work on hybrid orchids* 
Duplicate herbarium specimens were not 
distributed in such large numbers as in 
normal years* The following were despatched 
as exchanges:- 
To The Botanic Gardens, Buitenzorg, 
Java .... 391 
The Arnold Arboretum, U*S.A* .... 235 
The Forest Research Inst., Kepong 302 
The Philippine National Herbarium 120 
The Economic Botanist, 
Mandalay (grasses) . 53 
Total 1101 
The following specimens were received 
as exchanges:- 
From The Arnold Arboretum, U.S.A. .. 262 
The Conservator of Forests, 
B*N* Borneo .. 145 
The Philippine National Herbarium 125 
Total 532 
Herbarium! specimens were lent for pur¬ 
poses of study as follows 
To The Forest Research Institute, 
Kepong (Dipterocarpaceae) .. 
Prof* S.P. Agharkar, Calcutta, 
(Mangifera) 
Dr. C.G.G.J. van Steenis, 
Buitenzorg 
Dr. E.D. Merrill, Harvard 
(Olacaceae) •• 
Mr. Gordon Spare (Utricularia) •• 
Total 
273 
322 
29 
44 
The number of sheets of herbarium speci¬ 
mens mounted during the year wass- 
Local collections ... 3172 
Gardens herbarium . •« 592 
Exchange collections •• 3735 
Total 7499 
5 
