(317) 
lieved, and the sorting into their proper places of some 20,000 
valuable specimens mounted several years ago, has just been 
finished. 
Uses of the Herbarium. The herbarium has constantly 
been used by members of the Garden staff and officers and 
students of Columbia University for research work, for the 
comparing of specimens, for answering many inquiries of 
greater or less importance and in the prosecution of museum 
work. It has also been consulted by members of the staffs 
of other institutions in connection with critical work or vari- 
ous lines of research. 
Collection and exchange of specimens. Members of the 
staff collected herbarium specimens during the spring, sum- 
mer and fall both in the vicinity of the city and at more dis- 
tant points, wherever they happened to be. In this way many 
specimens, some of especial interest, others new to science, 
were added to the herbarium, while several thousand plants 
have been labelled and placed in our duplicate herbarium for 
future exchanges. We have already derived a benefit from 
our duplicates in the form of exchanges with several institu- 
tions and individuals. 
Tuseum and Herbarium Accessions. 
Botanical Garden, Harvard University, plates, purchased, 44 
Joseph Crawford, Oxalis cymosa, donated 2 
C. J. Hibbard, lantern slides, purchased................ 0025. 21 
. E. Steele, plants from West Virginia, purchased,....... 230 
E. E. Steele, plants from District of Columbia, pur- 
chased, 84 
Myrtle Z. Hough, plants from Arizona, purchased,........ 140 
H. E. Hasse, lichens from southern California, purchased, 200 
H. E. Hasse, lichens from California, purchased,........... 114 
United States National Museum, through J. N. Rose, 
Tradescantia gigantea, T. humilis, by exchange,...... 
Spencer Moore, plants from Australia, purchased,......... 250 
Joseph Crawford, miscellaneous herbarium specimens, 
exchange, 100 
Charles Mohr, turpentine exhibit, purchased,............... 20 
