5 
number of types. Dr. Arthur Hollick who was formerly asso- 
ciated with Professor Newberry, and under whose care the col- 
lection has grown to its present proportions, has been appointed 
assistant curator in charge of palaeobotany, and is constantly in- 
creasing the collection as the result of his own explorations. 
The weekly conventions held on Wednesday afternoons in the 
conference room of the Laboratories have proved a most stimu- 
lating feature to the attending botanists. Subjects have been re- 
cently presented as follows: 
Germination of Poa pratensis, by Mr. E. Brown, U.S. Seed 
Laboratory 
SS and floral features of Porto Rico, by Professor L. M. 
Underw 
oo of pollen tubes, and tetrad formation in Diodia, by 
Professor F. oyd. 
Plants and pears of the San Francisco Peninsula, by Mr. W. 
A. Cannon. 
Dascysypha resinaria, a fungus parasins on Adies balsamea, by 
Doctor Alex. P. Anderson. 
Flora of Newfoundland and Nova Scotia, by Doctor M. A. 
owe. 
Epithelial cells of Zea, secreting diastases, by Mr. John 
Torrey. 
Taxodium in eastern United States, by Mr. R. M. Harper. 
Problems in systematic mycology, by Professor F. S. Earle. 
The following schedule shows the special subjects in which 
special facilities are offered for research work. In addition it is to 
be said that a large number of problems in almost any subdivision 
of botany might be taken up by investigators of experience, and 
every effort is made to furnish the material facilities necessary for 
such work. The laboratories are open during the entire year 
and persons desirous of availing themselves of the facilities af- 
forded should address the Director-in-Chief : 
Physiology of the Cell—Problems in the chemical and the 
physical properties, movements and irritability of unicellular and 
other generalized organisms. Laboratory. Doctor MacDougal. 
Ecology.—Plants studied in relation to their environment and 
