14 MISSOURI BOTANICAL GARDEN BULLETIN 
this year. A few duplicates, however, have been sent to 
correspondents. 
Use of the Herbarium by Outside Botanists —A number of 
visiting botanists have consulted the herbarium from time 
to time during the year, and this number is increasing. 
Fewer loans of herbarium specimens have been made this 
year than in previous years, because it has seemed unwise to 
risk large shipments of herbarium material under the un- 
usual conditions which have prevailed. Nevertheless, every 
effort has been made to facilitate the work of specialists who 
were engaged in monographing technical or difficult groups 
of Sse Dr. Norma E. Pfeiffer, of the University of North 
Dakota, spent the greater part of the past summer in the 
herbarium in continuation of her monographic study of 
Isoetes; and it is planned to have the results of this study 
ready for publication some time during the coming year. 
1918) Summary: (For the year ending December 31, 
Number of specimens acquired on new accessions: 
Dy Pern ee 6,755 
Dy Pee Sk. ONS 1,703 
wey CROONER 5,179 
Be OE Work eS Se ee 6,935 
Retake iiask ek 20,572 valued at $2,057 20 
Number of specimens mounted and incorporated: 
Prout ‘all sotitees sc. 12,234 valued at $2,446 80 
Number of specimens discarded from the 
Berbatinie: ee 480 
Number of specimens in organized her- 
asia MEE ES oe ets 832,526 valued at $126,357 85 
Number of specimens in unorganized her- 
barium (estimated at)............... 65,000 valued at 5,200 00 
Wood specimens, etc., supplementing the 
Rethethie 36 oo avast wee eee valued at 280 00 
Bicrompe Slidee; We es valued at 410 00 
Sotat Chtuntioe ee $132,247 85 
LIBRARY 
In normal times the Garden library receives annually 
more than 1,500 serial publications containing more or less 
matter of botanical interest, but the interruptions through 
the war have reduced this number for the year 1918 to 790. 
There is record of each number and volume in arrears, and 
an effort will be made to secure these publications at the 
