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October 13. “‘ ASummer in Europe; Some Foreign Botan- 
ists and Botanical Institutions,” by Dr. W. A. Murrill. 
October 20. ‘‘ The Vegetation of the Florida Keys,” by 
Dr. M. A. Howe. 
October 27. ‘*How Plants Breathe,” by Dr. C. Stuart 
ager. 
November 3. ‘‘ Coal: Its Origin and Development,” by 
Dr. Arthur Hollick. 
November 10. ‘* The Vegetation and Botanical Features of 
the Inaguas and Grand Turk, Bahamas,” by Mr. G. V. Nash. 
November 17. ‘‘ Recent Explorations in the West Indies,” 
by Dr. N. L. Britton. 
November 24. ‘‘The Wild Nuts and Grains of North 
America,” by Dr. H. H. Rusby. 
A change in the hour of these lectures from 4 :30 to 4:00, 
as recommended, will not interfere with plans for visiting the 
collections under the new system now in operation, which 
admits of inspection of the buildings and grounds under guid- 
ance, any day in the week at 3 P. M. 
ScHooL LEcTURES 
Two series of lectures have been given under the auspices 
of the Board of Education in connection with the nature study 
work of 4 B and 5 B grades of the City Schools. These lec- 
tures were at first confined to the pupils of the Bronx, but in 
the autumn of 1906 they were extended to those of Division 
III, Manhattan. 
Grade 4B 
Lecture I, ‘‘ Cultivation of Plants,” by Mr. George V. 
Nash, was given to groups of pupils on April 27, May 4, 
May 11, October 5, October 11, October 12, and October 19. 
Lecture II, ‘‘ Seedless Plants,” by Dr. Marshall A. Howe, 
on May 18, May 25, June 1, October 25, October 26, Novem- 
ber 2, and November 9g. 
Grade 5B 
Lecture I, ‘* Woody Plants and Plants Without Wood. 
Protection of Trees in Cities,” by Dr. W. A. Murrill, on 
