(355) 
relieving the congestion in the main stack room and in 
library extension I. elf labels indicating the main 
subject headings have been introduced and it is hoped will 
prove helpful. 
ere have been added to the catalogue during the 
past year 1,920 written and typewritten cards, 3,081 cards 
issued by the Torrey Botanical Club, and 1,202 guide 
cards, making a total of 6,203. In addition to these, 59 
cards have been re-written. ‘The work upon the catalogue 
has included the supplying of biographical data, about 
half of the alphabet having been systematically gone 
through. 
The majority of the parts of German periodicals which 
failed to come during the war have now been supplied and 
it is probable that the volumes will be in time completed. 
number of German societies and institutions have re- 
sumed exchange relations. Considerable correspondence 
has been carried on with French and other publishers who 
had either temporarily suspended publication or for some 
other reason had stopped sending their periodicals, and 
satisfactory explanations have, for the most part, been 
receive 
The following additions and corrections should be made 
to the periodical list as appended to the report of the 
Librarian for 1916 (Bulletin 9: 342-363, 449, 450; 10: 43, 
268, 269). 
Omit § before the following: 
Belgium. Société Royal de ee Bulletin. 
tBerlin. Botanischer Garten, Notizblat 
{Botanisk Tidsskrift. 
Brandenburg. Botanischer Verein, Verhandlungen. 
Bremen. Naturwissenschaftlicher Verein, Abhandlungen. 
Deutsche Dendrologische Gesellschaft, Berichte. 
France. Société Dendrologique, Bulletin 
Hamburgische Botanische Staatsinstitut, Rae, 
Repertorium Novarum Specierum Regni Vegetabilis. 
