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July 20. “Fossil Plants and Their Significance,” by 
Dr. Arthur Hollick. 
July 27. “Some Floral Features of Southern Florida,” 
by Dr. M. A. Howe. 
Aug. 3. “Indian Agriculture,” by Dr. A. B. Stout. 
Aug. 10. “City Trees: Their Planting and Protection,” 
by Mr. Carl Bannwart. 
Aug. 17. ‘Exploring the cree Coast—II. Washing- 
ton to Oregon,” by Dr. W. A. Mur 
Aug. 24. “Grasses and Some of Their Uses,” by Mr. 
G. V. Nash. 
Aug. 31. “Exploring the Pacific Coast—III. Oregon 
to California,” by Dr. W. A. Murrill. 
Sept. 7. ‘Plant Parasites and Some Means of Con- 
trolling Them,” by Dr. F. J. Seaver. 
Sept. 14. “Experiments in Mutation,” by Professor 
Hugo de Vries. 
Sept. 21. “Exploring the Pacific Coast—IV. Cali- 
fornia,” by Dr. W. A. Murrill. 
Sept. 28. “The Upper Delaware Valley and its Flora,” 
by Mr. G. V. Nash. 
Oct. 5. “‘Botanizing in the Yellowstone National Park,” 
by Dr. P. A. Rydberg. 
Oct. 12. “Insect Galls Injurious to Vegetation,” by 
Dr. E. B. Southwick. 
Oct. 19. “Some Microscopic Water Plants,’ by Dr. 
M. A. Howe. 
Oct. 26. “The Chemical oe. = Albuminous 
Matters in Plants,” by Professor W. J. G 
ov. 2. “Exploring the Pacific Coast_V. California 
to New York,” by Dr. W. A. Murrill. 
Nov. 9. “Horticulture in the Northwest,” by Mr. G. 
V. Nash. 
Nov. 16. “The Forests of the Amazon,” by Dr. H. H. 
Nov. 23. “Recent Exploration in Bermuda,” by Dr. 
N. L. Britton. 
