 Author:
 Moor, J. H
 Publication Info:

Singapore:
no recorded publisher,
1837,
pg 275
Text on page 275
MEAN TEMPERATURE OF THE EQUATOR.
275
In order to deduce the mean daily temperature from these observations, we shall mate use of the corrections deduced from ttie hourly observations made at Leith Fo?'t for 18*24 and 1825. The mean daily temperature, for example, exceeds that ot 6 A. M., and 6 P. M. by 0A 29* and is less than that of noon by 2A 51. Hence we have
Mean daily temperature deduced from that 01 6ii and 6h, ~ ~ ^ 79A 74
ditto ditto. ditto 12 noon, w ^ ^ ^ 81 49
Mean of tbe two, 80A 47
As the corrections now applied be.]on? to a northern climate, marked with the vicissitudes of summer and winter, they cannot be strictly applicable to tropical regions, where the variations in tiie monthly temperature are so exceedingly small. We have therefore deduced the corrections from the hourly temperatures of the three summer months, during which the variations of the daily curve must have a greater resemblance to those ofthe torrid zone. These corrections, thou h different from those used above, produce, as wil1 be seen presently, verylittle difference in the mean results. These corrections area3.08 and 3.00, andathey ^ive Mean daily temperature deduced from 6b and 6h a* Ml %% 79* 37
ditto do. do. w ^ ^ 12 noon, 81 80
Mean of both, 80A 18
Hence tbe mean annual temperature of Singapore for 1822 was ** 80A 18
1823. Mean annual temperature ot 6h and 6b ^ ^ ^ ^ ^ 79A 0
do. do. ^ ^ ^ ^ v. 12 noon, 83 7 By applying the same corrections as before, viz. those deduced from the summer months,
we have mean daily temperature deduced from 6th and 6th 78A 92
do. do. do. ** ** 12 noon 80 73
Mean of both, 79A 81
Hence the observed mean annual temperature of Singapore for 1823 was ^ ^ 79A 81 And the observed mean annual temperature ot 1822 nod 1823 ~ 80 00
Mean annual temperature calculated from my formula of T=8lA8 sin. D a}a 1, . 81A 36
Difference, lo 36
2. MALACCA.aNorth latitude 2A 16a. East longitude 102A 12a. The observations at Malacca were made in 1809 by Lieutenant Colonel Wdliam Farquhar*
and the instrument was kept within the Oid Government house.
Mean annual temperature at 8h V% W %% *% Ml 77A 67
ditto do. 4 ^ ^ ^ ^ ^ a 82 33
The corrections deduced from the Leith observations are j* 1A 24 anda2A 97, which gives mean daily temperature deduced from 8h ~ ~ ~ 78A 91
ditto do. do. 4h 79 36
Mean of both, 79A 18
But by applying the corrections deduced from the summer months only, viz. 1A 24a. and 3A 95a. we have mean daily temperature deduced from 8h ~ 78A 9i
do. do. do. a 4h %% ~ ^ 78 38
Mean of both, 78A 65
Hence the observed mean annual temperature for Malacca for 1809 is ~ 78A 65
Ditto calculated from my formula T=81A 8 sin. D f* 1, %% 8i 02
Difference, 2A 39
3. At Prtnce of Wales Island.aNorth latitude 5A25\ East lonsritude. 10Qo 19\ The observations at Prince of Wales Island were made for 1815, 1816. 1820, 1821, and
ior 1823. They were taken in George Town, and those tor the two latter years were madeior 1823. They were taken in George Town, and those tor the two latter years were made