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September 11. Bolivian trails. Public lecture, New York 
Botanical Garden. 
October 1. Heredity and variation in plants. Biology classes, 
Manual Training High School. At the Garden. 
November 16. Economic plants and the geography of South 
America. Advanced Geography Classes, Maxwell Train- 
ing School for Teachers, Brooklyn. At the School. ° 
December 7. Bolivian plants and peoples. General Assembly. 
James Madison High School, Brooklyn. 
December 17. The nature, causes, distribution, and prevalence 
of fasciation with reference to the problems of genetics. 
Biological Seminar. Princeton University. 
December 28. The origin by mutation of differences in cold- 
resistance in the same plant species. (Read by title.) 
Genetics Section, Botanical Society of America, Phila- 
delphia. 
By the Registrar and Custodian: 
January 12. J/dentification of trees by leaves. 23d Regiment 
Armory, Brooklyn. — 
May 1. Use and beauty of our American trees. Brooklyn In- 
stitute, Academy of Music, Brooklyn. 
May 26. Flowers, wild and cultivated. Franklin K. Lane 
bo. Brooklyn, 
lanes T, W ud flowers and ferns and their conservation. Chil- 
dren’s Museum, Brooklyn. 
June 25. Presentation of medal. Troop 24, B. S. A., St. 
Mark’s M. E. Church, Brooklyn. 
By the Librarian: 
May 21. Brooklyn Botanic Garden library, its organization and 
work, Library School of the New York Public Library. 
At the Garden. 
June 25. Books and world power. New York Library As- 
sociation, Lake Placid, N. Y. 
By the Curator of Plants and Plantations: 
September 23. American Woodland Plants. Millbrook 
Garden Club. 
December 15. Colonial Garden. Colonial Dames. 
