definite charac 
361 
observing the behaviour of the more definite characters on 
crossing. 
CLIMATIC CONDITIONS—ACCLIMATIZATION . 
The most important differences in climate between different parts 
of the year in Ceylon depend especially upon variations in the 
amount of precipitation. Thus a general idea of these differences, 
so far as they affect the growth of plants, may best be obtained 
from a table of the monthly rainfall. Such a table is given below, 
and covers the period during which the work in Ceylon was 
Rainfall at Peradeniya in Inches, and Number of Rainy Days. 
1902-1903. 1903-1904. Average 21 years. 
Rain. Days. Rain. Days. Rain. Days. 
April 
May 
July 
13 17 
12 
The above table may be left to tell ite own story. An regard. 
between the maximum and minimum temperature rs greatedry 
weather than in wet. Thus the greatest darly range of temperature 
ommisin January or February, at the teaming 
season .terminating the north-east mommon, when ‘ h ° 
smallest range is recorded during th between 
monsoon to June and July, when tee average deference between 
m aximum and minimum is about 10 F. 
