3^0 Dr Davy on the Specific Gravity 
Feb. 12. 1820. 
S. Lat. T 
10', 
East Long. 82° 26'^. 
Air. 
Water. Hygrom. 
Wind and Weather. 
6|h A. M. 
T7° 
81°.5 
W. Fresh, cloudy, raining 
slightly. 
10 
80.5 
82 
5.5 
W. by S. do, pretty clear. 
12 
81 
82 
5 
Do. do. shower coming. 
2 P. M. 
82 
82.5 
6 
SS.W. Moderate, cloudy; 
6 
80 
82 
4 
SW. very gentle, cloudy, 
slight rain. 
8 
81.5 
82.5 
5.5 
SW, do. clear. 
The night was rather squally, with some heavy showers. 
Between about N. Lat. 3° and S. Lat. T or 8°, a north-west 
or westerly wind prevails during the same month that the north- 
east wind prevails in Ceylon. About the limits of the NE. and 
NW., and of the SE. and N W., calms commonly occur. Hence, 
we may expect, that as those parts of the ocean within the Tro- 
pics are particularly liable to calms, the temperature of the water 
will be unusually high, and that in those parts of the ocean 
within the Tropics which are particularly liable to squalls, the 
temperature of the water will be lower. The north-west or 
little monsoon blows from Madagascar, and the direction is pro- 
bably connected with that great island. The NW. is succeed- 
ed by the SW. monsoon, in the above latitudes. 
Feh. 13. 1820. 
S. Lat. r 57, 
East Long. 82° 52'. 
Air. 
Water. 
Hygr. 
Wind and Weather. 
o^h A. M. 
78°.5 
83® 
2®.5 
SW. very gentle, pretty clear 
8 
81 
83.5 
5 
Calm, clear. 
10 
81 
83.75 
5 
SW. by W. very gentle, cleaiv 
12 
83.5 
85 
S. by E, do. do. 
2 P. M. 
82.5 
85.5 
6.5 
SE. do. do. 
6 
81.5 
84.5 
6.5 
S. do. do. 
9 
82 
83 
6 
S, by E. do. do». 
The night 
was calm, with frequent showers. 
Feh, 14. 1820. 
S. Lat. 
7° 50', East Long. 82° 20. 
Air. 
Water. 
Hygi-, 
Wind and Weather,. 
O^h A. M. 
80® 
83®.5 
3®.5 
SW. Very gentle, cloudy. 
10 
80 
83,5 
5 
Do. gentle, do. 
12 
83.5 
84.5 
7.5 
Calm, light clouds. 
2 P, M, 
80 
84 
4 
S. Fresh, a squall ap- 
proaching. 
6 
82 
84 
6 
Calm, light clouds. 
9 
81,5 
83.5 
3 
S. by E, moderate. 
