416 WRIGHT : FOLIAR PERIODICITY 
3-—Climate in Ceylon and Java 
4 . —The Leafless Phase in the Tropics. 
General characteristics. 
Variation in different climates. 
Parts of Ceylon. 
Ceylon and Java; Peradeniya, Bniten- 
zorg, and East Java. 
Ceylon and Ursprung’s species. 
Variation in the same climate. 
Variation in successive years. 
5. —Transpiration in Ceylon. 
General. 
Periodicity and transpiration. 
6. —The relative importance of the physical factors- 
temperature, rainfall, humidity, and light. 
7. —External and Internal Factors. 
8. -Advantages of Periodical Phenomena. 
° f FOli "’ Fl0raI ’ and Frait Peri °>U- 
10.—Foliar Periodicity of Fossil Plants. 
11—FoUar Periodicity of Endemic Species. 
13-Fohar Periodicity of Indigenous Species. 
13.—Ceylon Indigenous Species in India. 
Sachs in his “Lectures on the Physiology of Plants ” in 
upon temperature and 
deny the co-operation of these l ™ hlD * t0 
“tIXtJnre'nd: 87 nP<m 
only indirectly affected hr th”* 17 ° f ® Xternal infl uences or 
- Us book 
foot that botanists are moling” at ‘ ention to the 
European floras, to connect the peri^icity o^I^ff.Ouf^tnd 
