(37) 
(2) Flat or pressed specimens. — About 34,174 herbarium 
sheets, containing fully 45,000 specimens, have been incor- 
porated in the permanent collections. 
(6) Bulky specimens. — Many specimens of a character 
not suitable for mounting on sheets have been temporarily 
stored awaiting a supply of cardboard boxes. 
3. ARRANGEMENT OF THE HeERBARIA. — The growth of 
the herbarium demanded a general rearrangement of most of 
the smaller groups, but the main groups are still located as 
they were last year, with the exception of the ferns, which 
are now advantageously arranged in the room east of the 
library. 
(a) Garden herbarium.— Although the growth of this 
collection has not equalled that of former years from a nu- 
merical standpoint, the quality of the material added has been 
rather superior. The West Indian and Philippine specimens 
lately incorporated are of the greatest value. 
Out of 52,025 specimens received for this collection about 
43,000 were mounted on herbarium sheets and distributed in 
the cases. 
(6) Columbia University herbarium. —The development 
and conservation of this collection continued as outlined in 
previous reports. Certain groups, too, have been rearranged 
in connection with the monographing of genera and families 
for the ‘«* North American Flora.” 
Additions aggregating 265 specimens were received, and 
these, together with about 2,000 specimens mostly from the 
Morong herbarium, deposited by Barnard College, were 
mounted and incorporated, thus making a total addition of 
fully 2,265 specimens. 
(c) Duplicate herbarium. — About 6,000 specimens were 
distributed from our duplicate material. In return for these 
we have received valuable specimens, a majority of which 
will be used in the permanent collections. 
5. Uses or THE Herzarium. The collections have been 
used for research work by the members of the staff and stu- 
dents, especially in connection with the preparation of manu- 
