TWELFTH ANNUAL REPORT OF THE DIRECTOR. 17 
The library exchange list has been considerably increased, 
so that at present 1,093 serial publications are received, 
of which 84 are purchased, and 1009, issued by 770 
institutions, are presented.* 
Visiting botanists, as in previous years, have made use of 
the facilities for investigation afforded by the Garden, which 
have also been made available to correspondents as far as 
practicable, and one candidate for the Master’s degree in 
Washington University has spent a part of the year in 
resident graduate work. 
The office staff has remained the same as in 1899, except 
that Mr. Jesse B. Norton resigned his position in the library 
in February, his. place being taken by Miss Ida L. Norton. 
Approximately the same percentage of their time as in 
preceding years has been given by the Horticultural and 
Botanical Assistants to research work, some of the results 
of which are now ready for publication and will shortly 
appear in the Reports of the Garden or other suitable places. 
In the course of a hasty visit to Northern Mexico in March, 
I became sufficiently interested in several undescribed or 
imperfectly known Yuccas and Agaves and related plants to 
revisit Mexico twice later in the season, and the results of 
my study of these plants, which were presented in abstract 
before the Botanical Society of America in June, will be 
published from the Garden in the near future. 
The instruction of Garden pupils, provided for in Mr. 
Shaw’s will, has been carried on during the year on the lines 
noted in earlier reports. Two pupils, Charles Deusner 
and Cornelius Winther, having completed the prescribed 
course, were granted certificates in March, after examina- 
tion by the Garden Committee. The vacancies so created 
were filled by the appointment of Charles W. Fullgraf, of 
St. Louis, and Oliver P. Marker, of Evansville, Ind.; and 
John H. Tull, of Morganton, N. C., was admitted in April 
* Report. 10:25, 91. 11317. 
