247 
fire destroys either deposits of humus or humus in the sand 
which is already an impoverished soil. Such fires, if ears 
repeated, will transform the Florida peninsula into a des 
waste and not as we found it in the spring of 1921, a ee 
sert. 
Joun K. SMALL 
PUBLIC LECTURES DURING OCTOBER 
Oct. 6. ‘‘The Ancestral History of Some Existing Plants.” Dr. 
Arthur Hollick. 
Oct. 7. “Perfumes, Natural and Synthetic.” Prof. M. T. 
ert. 
Oct. 13. oe Coloration.” Dr. A. B. Stout. 
Oct. 14. ‘Botanizing in the Colombian Andes.’ Prof. T. E. 
azen. 
Oct. 20. ‘Plants in Relation to Environment.” Prof. G. E. 
Nichols. 
Oct. 21. ‘European Garden Mr. J. C. Wister. 
Oct. 27.‘ Botanizing in British Guiana.’ Dr. H. A. Gleason. 
Oct. 28. ‘The Evolution of the Lantern Slide.” Mr. A. T. 
Beals. 
” 
PUBLIC LECTURES DURING NOVEMBER 
Attendants upon the Saturday and Sunday afternoon lec- 
d r 
tures are asked to jn mind a change in the hour, t 
mber lectures occurring at 3:30 instead of 4 o’clock. The 
lectures are to be delivered in ecture of the Museum 
eL 
Building. They are illustrated by lantern slides and otherwise 
and are free to the public 
Nov. “Mountain Sceien, of United States and Mexi- 
ffer: 
Nov. 4. “Rare Pines and Firs.” Mr. se - ee 
: “Botanical Rambles in Panam M. A. Howe. 
Nov. 11. “The Origin of Cultivated Plante.” — A. B. Stout. 
Nov. 17. “Ferns.” Dr. R. C. Benedict 
Nov. 18. “Javaand the Javanese People! Dr. H. A. Gleason. 
Z 
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