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received during the year and from those acquired in previous 
years were poisoned, mounted and sorted into the permanent 
collections. These specimens fall into two groups, namely: 
(2) Flat or pressed specimens. About 35,000 sheets of 
herbarium paper were used in mounting flat specimens. 
These sheets contain about 45,000 specimens, all of which 
have been sorted into their proper places in the cases. 
(6) Bulky specimens. Approximately 2,000 specimens of 
dimensions unsuitable for mounting on sheets were placed in 
boxes and arranged in their proper places. 
The collection of seeds and fruits contained in the multiple 
boxes was gone over specimen by specimen, thoroughly 
cleaned, and the whole series arranged in cases by families 
and genera. It is now easy of access and may be readily 
consulted. 
2. ARRANGEMENT OF THE Hersaria. The main plant- 
groups are disposed about the same as they were last year. 
The congested condition of the flowering plants and the ferns, 
caused by the rapid growth of these groups, was relieved by 
the addition of new cases. 
(a) Garden Herbarium. The portion of this series compris- 
ing the flowering plants was completely rearranged, the North 
American specimens being placed in species-covers, while 
the exotic specimens were conveniently arranged in genus- 
covers. Such portions of the collection comprising the flower- 
less plants as were needed for study, especially in connection 
with the preparation of manuscript for the North American 
Flora, were specially rearranged. 
(6) Columbia University Herbarium. The specimens of 
certain families and genera of this series were remounted and 
strapped wherever necessary, while those portions used in 
connection with work on the North American Flora were 
rearranged to conform with the sequence of groups adopted 
in that work. 
(c) Duplicate Herbarium. About 7,000 specimens, con- 
sisting chiefly of duplicate plants collected on the exploring 
expeditions maintained by the Garden in North America and 
