Dr Davy on ihe Temperature^ ^c. (^tlie Sea. 
Feb. 19. 1820. 
S. Lat. 10° 27', East Long. 80° 25'. 
Air. 
Water. 
Hygr. 
Wind and W eather. 
7h A. M. 
00 
o 
o 
83“ 
4“ 
Calm, pretty clear. 
10 
82 
84 
6 
W. NW. very gentle do. 
12 
84. 
83.5 
7 
Do. do. do. 
3 
83.5 
84.5 
8 
Do. do. do. 
6 
82 
83.5 
6 
W. by N. gentle, rather clear. 
9 
78 
83 
2 
Calm, overcast after a shower. 
The night 
was rainy, with little wind. 
Feb. 20. 1820. 
/ 
Air. 
Water. 
Evap. 
Wind and Weather. 
64’n A. M. 
77“ 
82“.5 
2“ 
Calm, overcast. 
10 
79 
83 
4 
Do. do. do. 
12 
79 
83 
3 
Variable, very gentle, slight 
rain. 
6 P. M. 
76 
82 
1 
W. N W. gentle, overcast. 
The night was stormy and rainy, and the wind blowing a gale. 
During this gale, the sky was thicldy overcast, so as to be of a 
dark grey or light sootty hue, but the sea retained its usual co- 
lour. Its blue colour appeared very distinct, when one looked 
immediately down from the ship into the sea, and it was equally 
evident in the waves as they rose, their heads being between the 
light and the eye of the observer. Even in the colour of the 
surface of the sea in general, a tint of blue might be distinguish- 
ed, but it was not bright, on account of the darkness of the 
surface. Hence, we may infer, that the ocean does not owe its 
blue colour to the reflected azure of the sky, as several authors 
diave supposed. 
