22 MISSOURI BOTANICAL GARDEN BULLETIN 
of mail and express in European countries, no material has 
been sent to foreign institutions. 
Use of Herbarium by Outside Botanists. —The number of 
visiting botanists making use of the herbarium is constantly 
increasing ; and several loans of certain groups of plants have 
been made to institutions in different parts of the country 
in connection with monographic studies of specialists. In 
general such loans have proved of marked mutual advan- 
tage. 
a Summary: (For the year ending December 31, 
Number of specimens acquired on new accessions: 
Dy” PUECNAER ass oy eens tee 10,282 
Bes Se a ees 4,169 
BY CXONGNR Ss Pe 4,418 
By Geld? work 3s Snes a ds aes 8,800 
eS eee 27,669 valued at $2,766 90 
Number of specimens mounted and incorporated: 
From Chapman Herbarium............. 3,583 
From Letterman Herbarium............ 1,229 
From all other sources................ 16,926 
Rao kesee eS 21,738 valued at $3,260 70 
Number of specimens discarded from the 
UTI oe 635 oS es oe 43 
Number of specimens sent to corre- 
spondents on the basis of exchange.... 10,041 
Number of specimens in unorganized 
herbarium... =<. -. (estimated at) 56,000 valuedat $4,480 00 
Number of specimens in organized her- 
barium So. see 803,563 valued at $120,534 45 
See yes oy Oe oe ee Se Se ee ee Oe ee 280 00 
Microscope slides, etc., ‘valued-@t...2.2 |. 410 00 
Total -vainsiien. <3. $125,704 45 
LIBRARY 
Throughout the year a large part of the daily work has 
been devoted to checking up and entering publications as 
they have been received, sending them at once on the round 
of the laboratories, collating them for the binders, and finally 
indexing and distributing them on the shelves, 
We have been able to purchase from abroad but f. f | 
the old books which are still lacking to complete ‘et "The 
closeness of the blockade against Germany and Austria has 
