66 
botanical department of Columbia University, to those of the 
New York Botanical Garden, and those of the Central Museum, 
for their courtesies in the matter of library and other facilities 
furnished me. I also take pleasure in acknowledging my in- 
debtedness to the acting curator-in-chief of the Central Museum, 
Mr. E. L. Morris, for his kindness in installing facilities for 
microscopic and other work. 
Respectfully submitted, 
DGAR W. OLIVE, 
Curator of Public Instruction. 
