254 
1907 
April. 
May.. 
June. . 
July.. 
Aug .. 
Sept.. 
Oct... 
Nov... 
Dec... 
1908 
Jan . . 
Feb . . 
March 
3 
a> 
pa 
ft) w 
7) cj 
29.814 
29.883 
29.883 
29.872 
29.884 
29.822 
29.874 
29.881 
29.877 
29.875 
29.883 
29.880 
145.3 
149.2 
147.6 
147.1 
150.8 
147.8 
141.3 
149.8 
137.0 
147.2 
149.6 
143.9 
Temperature 
81.0 
80.8 
80.3 
80.5 
80.9 
80.7 
79.4 
80.3 
78.9 
80.9 
80.8 
80.2 
91.1 
90.5 
90.0 
90.4 
90,3^ 
90.7 
89.5 
89.3 
89.3 
71.6 
71.8 
71.1 
71.3 
70.6 
70.9 
70.7 
71.1 
70.2 
90.5 71.1 
90.1 ! 70.6 
89.8! 70.8 
- 
3 
fl> 
19.5 
18.7 
18.8 
19.1 
19.7 
19.8 
18.8 
18.2 
19.1 
19.4 
19.5 
19.0 
Hygrometer. 
76.5 
76.5 
76.1 
76.3 
< 
— 
z 
0.832 
0.830 
0.819 
0.825 
76.2 0.818 
76.5] 0,833 
76.0 0.840 
75.8 
75.8 
0.810 
0.828 
76.6 0.839 
75.6 0.807 
76.8 0.820 
73.7 78 Calm 
73.6 79 Calm 
73.2 78 S W 
73.4 79 SW 
73.0 77 S W 
73.7 79 
73.6 83 
72,9 78 
73.7 84 
73.8 79 N W 
72.9 77 Calm 
73,5 79 S W 
S W 
SW 
SW 
S w 
12.69 
7.55 
7.44 
3.37 
0.72 
6.69 
12.38 
7.73 
18.92 
7.71 
14.01 
10.10 
fD 
3 P? 
2.48 
2.53 
3.56 
0.90 
0.72 
1.26 
2.43 
1,50 
3.65 
5.20 
3.00 
2.67 
The rainfall in the countries visited is very great and well dis- 
tributed over the year. Para seems to do best in districts where 
the rainfall is from 70 to 150 inches per annum. An 
Rainfall, experiment with irrigated Para trees is being carried 
on at the present time in Ceylon in a district where 
there is little rainfall and in a locality where the trees are exposed 
to the wind which tends to wither the leaves. Irrigatetd frees in 
dry districts would in all probability do well if they were pro- 
tected from the wind. There are no strong winds in the rubber 
districts, the wind seldom exceeding a velocity of 20 miles an hour 
below the 3000 feet altitude. Flat low land was origin- 
Wind. ally preferred for rubber plantations but rubber does 
equally well in rolling or hilly country. The elevation 
at which most of the rubber is planted is below 200 feet. The 
thirty year old Hevea trees at Peradeniya at an elevation of 1500 
feet above the sea level, however, show an excellent growth. 
Soil. The soil in Malaya is alluvial and in some localities 
mixed with a moderate amount of sand. Photo No. 1 
shows 15 months old Hevea growing on such soil. Sandy soil, 
however, is unsuitable while rocky soil is generally favorable. 
The following gives the analysis of some of the soil in Ceylon. 
I quote from Circular No. 6, Volume III, of the Royal Botanic 
Gardens, Ceylon, a copy of which was kindly furnished me by 
Dr. Willis: 
