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20 MISSOURI BOTANICAL GARDEN BULLETIN 
1255 duplicate herbarium specimens have been distributed 
to different herbaria. 
Use of the Herbarium by outside Botanists—Numerous vis- 
iting botanists have consulted the herbarium at various times 
during the year. A distinct service has been rendered to 
specialists in different parts of the country through the loan 
of herbarium specimens of special groups of plants. These 
loans have encouraged and furthered monographie study and 
have resulted in every case to a mutual advantage of all pare 
ties concerned. 
Statistical Summary (For the year ending December 31, 
1923). 
Number of specimens received on new accessions: 
By purchase .. 4,790 
{iia 2 | 5 eee 1,270 
By exchange .. 3,764 
By field work.. 1,502 
By photography 33 
| at 11,359 valued at $1,135.90 
Number of speci- 
mens mounted 
and incorporat- 
WE ee hearse ee 12,406 valued at $2,481.20 
Number of speci- - 
mens discarded 
from the herba- 
Lig hi 7 Sa glee ee PR 48 without value. 
Number of specimens in organized her- 
ETI ie ast Gesica aig «mee OW oh o.6-8 900,722 valued at $142,033.90 
Number of specimens in unorganized 
TE EELIIIE, os cerca e-0k brew a ee Fs 68,168 valued at 5,473.46 
Wood specimens, etc., supplementing 
Drie DOP BAP I a ssc Ree ee 0s Ses valued at 280.00 
Microscope slides, etc.............e0. valued at 410.00 
PME VEAL CROAT. 5 6. Hie Seon 6:6 b'd wa or elale Sis be a Bie we CRI $148,197.36 
LIBRARY 
During the year 1923 there have been no changes in mem- 
bership of the library staff. As in former years, the members 
have been employed in caring for the present contents of 
the library, in entering and incorporating the numerous addi- 
tions of the year, and in editing and publishing the two pe- 
riodicals which are maintained by the Garden for the output 
of its work in botanical research and horticulture. 
