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Lecture III, ‘‘ Classification of Plants,” by Dr. N. L. 
Britton, was given on Tuesday, December 5, and Friday, 
December 8, and Tuesday, December 12. 
The following lectures were given in the auditorium of the 
museum, in July, for the benefit of students attending the 
summer session of New York University : 
‘¢ The Origin of Species,” by Dr. D. T. MacDougal. 
‘* The Cactus-family,” by Dr. N. L. Britton. 
«¢The Economic Uses of the Leguminosae,” by Dr. Henry 
H. Rusby. 
At the autumn exhibition of the Horticultural Society of 
New York held in the Museum, November 16, Dr. N. L. 
Britton gave an illustrated address on ‘‘ Fruits of Native 
Trees and Shrubs.” 
Lectures of other Institutions by members of the staff have 
been given as follows: 
January 15. Before the Port Richmond (Staten Island) 
Y. M. C. A. on ** Social and Religious Life in Alaska,” by 
Dr. Arthur Hollick. 
June 30. On invitation of Miss Elizabeth Billings, at 
Woodstock, Vt., on ** A Canoe Trip Down the Yukon River, 
Alaska,” by Dr. Arthur Hollick. 
July 26. <«* Aspects of Desert Vegetation,” by Dr. D. T. 
MacDougal, at the Marine Biological Laboratory at Cold 
Spring Harbor, Long Island. 
October 20. At Blacksburg, Va., under the auspices of 
the Virginia Polytechnic Institute, on ‘* Cuba and Cuban 
Farming,” by Dr. W. A. Murrill. 
Also several lectures in New York City for the Board of 
Education on ‘* Cuba” and ‘* The Austrian Tyrol,” by Dr. 
Murrill. 
October 21. ‘* Haiti~~ the Negro Republic,” at the Field 
Columbian Museum, Chicago, by Mr. George V. Nash. 
November 16. ‘The Hemlock Forest in the New York 
Botanical Garden, and what it signifies,” before the Bronx 
Institute of Arts and Sciences at the Tremont branch of the 
New York Public Library, by Dr. N. L. Britton. 
