IN CEYLON. 
433 
am indebted to Dr. Trenb for the information in the following 
synopsis of the monthly rainfall, humidity, and temperature 
at Pascercean in East Java and Buitenzorg. 
Climate during 1904 in Java. 
In studying this part of the subject we find that plants of 
the same species may show variation in different climates, 
and in the same neighbourhood, and in several cases even 
the same tree exhibits differences in foliar periodicities 
from year to year. 
The facts recorded in this section lead to certain conclu¬ 
sions which form the stepping stones for subsequent 
deductions of some importance. They prove first and 
foremost that under tropical conditions with regular rainfall, 
heat, and light, and in the absence or presence of climatic 
periodicities certain plants undergo defoliation at a particular 
time of the year. They prove that in a tropical district 
supplied with rain during every month of the year— 
