627 GENERAL REPORT OP THE RESIDENCY OP SINGAPORE. 
It will be observed from the above that the greatest fall of rain 
during these four years occurred in January 1842 and the least in 
June 1843. The year 1841 was usually dry, 73 inches only 
having fallen, while the succeeding was unusually wet, 116 having 
fallen: this was caused by the unusual'dryness of January and October 
in the former year and the unusual wetness of both in the latter. 
By examining the average for each month, the seasons will be 
found to be very equable, the least average being for September 
and June which respectively have 4.400 and 5.526 inches and the 
f reatest being for January and October respectively 13.656 and 
1.855 inches. During the other months the fall of rain range* 
from 6 to 9 inches. The annual average fall is 92.697 inches, a 
quantity which is about 2 inches less than the average fall for the 
latitude of Singapore as stated by Humboldt, who gives 96 inche* 
as the average fall at the Equator. 
With regard to the temperature of the atmosphere, in 1841-2-3- 
4 and 5 the mean was 81* 247, the lowest mean of a month being 
for January 72* 55, the temperature increases to May, June and 
July which have 82* 30, 82* 29 and 82* 24 respectively. It is 
concluded from the above that the temperature of Singapore is 
2* 90 less than other localities in similar latitudes, and that the 
range betwixt the mean temperature of May and January extend* 
over 2* 76 and adding up the mean temperature of each month of 
each year, we have the mean temperature as follows 
Of 1841 1842 1843 1844 and 1845 
As 81*28 81*6 81*09 80*82 and 81*66 
From which this inference is drawn that in five successive year* 
the mean temperature did not vary one degree. 
Deduction made from other tables gave the maximum tempera¬ 
ture for 5 years at 87° 5 and the extreme minimum 74o 7, the former 
occurred in June 1842 and the latter in January 1843, giving the 
greatest range as 9° 8. To this I may add that I have seen the 
thermometer down to 68 2 5 in January of the present year, at Bonny 
Grass the residence of Dr Little, where the thermometer was hung 
in a building, well protected from the sun, but open on all sides. 
From observations taken by Captain Davis during 6 years, the 
mean temperature was 
in 1820, 1821, 1822, 1823, 1824 and 1825. 
as 79.5 79.4 80.2 79.8 81.0 and 81.4 
these observations were taken at 6 a. m. and noon, and the following 
taken at the Singapore observatory during the same hours give 
In , 1841, 1842, 1843, 1844, and 1845. 
As 82.0 % 82.08 81.58 83.7 and 84.04 
thus showing that in 20 years the temperature of Singagore town 
has encreased 2* 48. The cause of this advance of the temperature 
is assigned to the country within 3 miles of the town being now 
clear of jungle and cultivated, which formerly was covered with 
primival forest. 
