1 
In no case was there any perceptible difference between the temperature 
on the sea bottom at any given depth, and the temperature of the sea 
at an intermediate depth of the same number of fathoms, where the 
whole depth at that spot was greater, i.e., the temperature at 600 fathoms 
was always about 45 Q 8 Fah., whether the sea were only 600 fathoms deep 
at that spot, or whether it were much deeper. The following table com- 
prises the results of many hundred observations upon the temperature of 
the sea at various depths in the North Atlantic basin, taken off the N.W., 
W., and S.W., coast of Ireland, the northern limit being 57 Q 30' N., the 
western 15° 25' W., and the southern 47 Q 35 7 S. 
Relation of Temperature to Depth in the North Atlantic basin. 
JL EMPER ATTIRE. 
Degrees Fah. 
Depth in Fathoms. 
54 
Surface. 
53 
52 
51 
100 
50 
200 
49 
300 
48 
400 
47 
500 
46 
600 
45 
44 
700 
43 
42 
800 
41 
40 
900 
39 
1000 
1100 
38 
1200 
1300 
1400 
37 
1500 
1600 
1700 
1800 
1900 
2000 
2100 
2200 
2300 
2400 
36 5 
2435 
