MARITIME OBSERVATIONS. 99 
it was 57, and in water onthe furface 52. Depth 46 
fathoms, ° ! whe 
Jn lat. 44s 52. N. long. x. 57.W.. July 11, 1790. 
HE people caught feveral codfith and hallabot, the ther- 
mometer was put into three codfifh and one hallabot 
fucceflively, the inftant they were hauled up, and the in- 
{trument marked 37 in every cafe. The air was at 57, 
and the water at the furface was 53. The firft experiment 
was repeated after the fifh was gutted, and it then marked 
one degree warmer. I thence conclude that the difference 
between the two experiments was owing to the time the 
fifth was in the air before the trial, and that in all the in- 
ftances the animal heat of the fifh was about 16° 
colder than the water at the furface; and as it feems natu- 
ral, from analogy, to fuppofe that animal heat is at leaft 
as warm as the fluid in which the animal lives, I conclude 
that the water at the bottom was as cold as 3712. e 16% 
colder than atthefurface. In a former voyage it was found by 
decifive experiment, that near the coaft in very hot weather 
the water at the bottom in 18 fathoms was 12 degrees 
colder *than at the furface. 
Another reafon to fuppofe that the water was colder at 
bottom than the animal heat, was the great diftenfionof the 
cods founds when they were opened, although they had 
fent out innumerable bubbles of air in the paflage up; the 
air, therefore, within the found, muft have been much 
more comprefied, (either by cold or the power of the ani- 
mal) below, than above,where it was at 37. Several fith 
that had been hauled up to the furface of the water, and 
then d roppedfrom the hook, fwam light on the furface 
Nr2 till 
* See Philofophical Tranfactions, Vol. Hl. page 329. 
