ON THE MEDICAL TOPOGRAPHY OP SINGAPORE. 457 
1821, on 203 days, in 1824, on 136 days, and in 1825, on 171 
days; giving an average on 4 years of 185 rainy and 180 dry days.” 
I am happy that I am able to give with accuracy the quantity of rain 
that fell at the Singapore Observatory in 4 years and 9 months 
embracing the years 1841, 1842, 1843, 1844, and part of 1845. 
Fall of rain at the Singapore Observatory Shown by the member of inches* 
Months. 
1841. 
1842. 
1843. 
1844. 
1845. 
Fallof rain each month 
for 
Inches 
January, 
3.750 
22.585 
18.070 
10.219 
5.750 
60,374 
1 
Feb’ry... 
6.750 
10.900 
3.050 
6.923 
4.225 
31.848 
March,.. 
5. 09 
7.220 
8.015 
4.150 
3.030 
27.454 
1 
April,... 
3. 19 
10.071 
5 645 
12.300 
7.250 
38.385 
1 
May,.... 
6. 95 
9.003 
9.000 
7.775 
5.025 
34.898 
)>5 years. 
JqdCj i «*» 
7.490 
6.320 
2.270 
6.025 
5.375 
27.480 
July,,. .. 
7.228 
5. 98 
8.500 
5.890 
3.395 
30.411 
August, . 
7.095 
6. 25 
5.545 
5.750 
6.750 
31.165 
Septr... . 
4.220 
4.250 
4 055 
5.075 
10.250 
27.850 
October,. 
4.070 
21. 05 
12,145 
10.200 
« • 
47.420 
4 years. 
Novr..., 
12.225 
9,420 
9.560 
6.060 
• * 
37.265 
4 years. 
Deer. 
6.175 
4.350 
6.415 
8.750 
• • 
25.690 
4 years. 
73.126 
116.247 
92.300 
19.817 
Taking the average of these 4 complete years we have 92. 697 as 
the annual fall of rain in Singapore. The greatest fall of rain in 
these 4 years was in the month of January to the amount of 22. 585, 
and the smallest in the month of April to the amount of 3. 19. 1842 
must be considered as a very wet year, 116. 247 inches having fall¬ 
en, while in the preceding year of 41 only 73. 126, is the amount. 
The months in which most rain fell were January and October, the 
next were April and November; while the month in which least 
rain fell was March. As already pointed out most rain falls in the 
N.E. monsoon, and the dry weather may be said to exist in the S. 
W. monsoon. No particular quarter of the wind seems to have much 
influence on the fall of rain; as these tables show we have the great¬ 
est fall when the N.E. is the general direction, nearly the same quan¬ 
tity when the S.W. is the quarter, and not less during the continua¬ 
tion of the wind from the N.W. The only inference that can be 
drawn is that when the wind is from the S.E. less rain falls. 
v 
