36 MISSOURI BOTANICAL GARDEN BULLETIN 



Statistical Summon/: (For the year ending December 31, 



1920): 



. 



Number of specimens received on new accessions: 



By purchase 5,141 



By gift 808 



By exchange 1,154 



By field work 679 



Total 7,782 valued at $778.80 



Number of specimens mounted and in- 

 corporated 14,155 valued at 2,831.00 



Number of specimens discarded from 



the herbarium 37 



Number of specimens in organized her- 

 barium 861,824 valued at 132,236.65 



Number of specimens in unorganized 



herbarium (estimated) 72,167 valued at 5,773.36 



Wood specimens, etc., supplementing 



the herbarium valued at 280.00 



Microscope slides, etc valued at 410.00 



Total valuation $142,309.21 



LIBRARY 



The duties of the Library force during the year have con- 

 sisted for the most part: first, in incorporating into the 

 library both the many hundreds of serial botanical publica- 

 tions regularly received and the extensive accessions of new 

 books and pamphlets acquired by donation and purchase; and 

 second, in editing and distributing to exchanges and sub- 

 scriber* the publications of the Garden. 



En addition to the above the limited space available for the 

 library has necessitated extensive shifting of books, as cur- 

 rent additions to the various sections have required more 

 apace than remained available. Greatly needed room for such 

 expansion was obtained during the year by moving the books 

 of sections (1, plant physiology, and H, biography, to the room 

 formerly used by the Red Cross workers as a cutting room. 

 These new quarters contain tables and a good reading light, 

 thus providing means for preliminary consultation by students 

 of the books in these sections. 



Publi-catians. — The current volume, vol. VII, of the Annals 

 op the Missomn Botanical Garden, which is our principal 

 exchange for publications of scientific societies and institu- 

 tions, contains :Y.V) pages, 7 plates, and 82 text figures, and 

 records the results of scientific researches by the scientific 

 staff and graduate students of the Garden. It has been com- 

 puted that the value of exchanges received for the Annals 



