Dr. Davy's observations 
on the 
Hour. 
Temperature.. 
6 
78,5 
8 
78 
10 
- 78 
12 
77,75 
2 A. M. 
77,75 
4 
77, 5 
6 
77, 5 
April 5th. S. lat. 24,° 22" W. long. 2 6° 27". Wind ENE„ 
Hour. Temperature. 
6 A. M. - - 7 6 " 
8 - - 77,5 
10 78,25 
12 - - 7 9 ’7 5 
s P. M. - - 78, 5 
4 - - 77.75 
6 - - - 77, 5 
8 - - 77 
10 - - 77 
is - - - 76, s 
s A. M. - - 76, 5 
4 - - 76 
Here we perceive the variation of the temperature of the 
air, following the course of the sun, pretty considerable 
whilst it is above the horizon, and very insignificant during 
the night ; and this, I may remark, is a general fact at sea, 
and one of the principal features of difference between the 
temperature of the atmosphere over the land, and over the 
ocean. 
