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May g. “Wild Flowers of Spring,” by Dr. N. L. Britton. 
May 16. ‘American Orchids,” by Mr. G. V. Nash. 
May 23. ‘‘The Protection of Shade Trees against 
Insect and Fungous Enemies,” by Dr. F. J. Seaver. 
May 30. “Some Plants of Our Swamps,” by Dr. J. H. 
Barnhart. 
June 6. ‘The Soil, the Basis of Success in Gardening 
and in Other Lines of Productive Work,” by Mr. George T. 
Powell. 
June 13. “‘Diseases of Potatoes,” by Dr. Mel. T. Cook. 
June 20. “Floral and Scenic Features of Porto Rico,” 
by Dr. M. A. Howe. 
June 27. “Haiti, the Negro Republic,” by Mr. G. V. 
Nash. 
July 4. “The Secret of the Heather,” by Mr. F. V. 
Coville. 
July 11. “Explorations in Mexico,” by Dr. W. A. 
Murrill. 
July 18. ‘‘Arctic and Alpine Plants,” by Dr. P. A. 
Rydberg. 
July 25. “Wild and Cultivated Plants of Bermuda,” by 
Dr. N. L. Britton. 
Augusti. “Reef-building and Land-forming Seaweeds,” 
by Dr. M. A. Howe. 
August 8. “‘Medicinal Plants Found in the Vicinity of 
New York City,” by Dr. Wm. Mansfield. 
August 1§. “Evergreen Trees and Shrubs,” by Mr. 
on Trees,” by Dr. W. A. Murrill. 
August 29. “The Trees of the Rocky Mountains,” by 
Dr. P. A. Rydberg. 
September 5. “The Life History of a Tree,” by Dr. 
C. S. Gager. 
September 12. “Diseases of Cultivated Plants,” by Dr. 
G. P. Clinton. 
September 19. “Interrelations between Botany and 
Geology,” by Dr. Arthur Hollick. 
