(45) 
of Columbia University have continued to present current 
American and foreign agricultural departmental reports and 
miscellaneous botanical dissertations. 
The rapid increase of books has necessitated more space 
and 20 quarter sections of steel stacks similar to existing ones 
have recently been put into place. An entire rearrangement 
of the stacks was successfully accomplished, the changes ad- 
mitting of the possibility of the future construction of two new 
stacks at the southern end of the stack-room. These changes 
will provide space for from 4,000 to 5,000 volumes. The 
folio tables were also moved and differently spaced and the 
volumes rearranged more advantageously. Considerable ad- 
ditional space for development was thus secured. 
The determinations and studies of the Asclepiadaceae have 
been continued from time to time and I have also participated 
in the work on heredity and evolution described by the As- 
sistant Director, part of which has appeared as Publication 24 
of the Carnegie Institution of Washington, and a continu- 
ance is to be included in a paper now in preparation to be 
offered to the same institution. Of the mutants of Oexothera 
Lamarckiana, plants of O. brevistylis, O. scintzllans, O. lata, 
O. oblonga and O. albida have been followed from the seed- 
ling stage to maturity, and an anatomical description of these 
forms is included in the unfinished paper. 
Similar studies of Oenothera grandifora, O. Oakestana, 
O. Simstana, O. parviflora and O. muricata have been made, 
and the identity and general characters of all of these species 
seems now fairly well established. It is to be seen from the 
material, including seeds, living plants and preserved speci- 
mens, received from correspondents in various parts of the 
country, that there are a large number of elementary species 
of the evening-primroses, which have hitherto escaped de- 
tection. All plants received are grown in pedigreed cultures 
in order to establish their identity beyond mistake. Abun- 
dant material and numerous drawings are being made as a 
record of these studies. 
Some assistance has also been rendered in the revision of 
