TEMPERATURES. 233 
(Figs. 160, 161), and in 1853 off Cape Cañaveral (Fig. 162), off 
St. Simon’s Island, Ga. (Fig. 163), and off Charleston, S. C., by 
Lieutenant- Commanders Craven and Maffitt. These sections 
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i Ё + o о мода $ iH 
1 sspe fg E 13123 14 
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show that the temperatures of the line across the Gulf Stream 
from Gun Key are, as a whole, colder than those at the above- 
named points. 
We seem here to have positive proof that the large body of 
23t 
Fig. 159. 
South. of 
3509 m.E.ot 
Cape Cañaveral. 
d Cape Cail 
84 fms, 
X Gzzfins. 
11 fms. 
525 fms. 
120 miles E,of 
Cape Catiaverzl 
464 
E. T 
Fig. 160. Vig. 161. 
warm water to the north of the straits adjoining the colder 
water of the Gulf Stream must mainly derive its heat from the 
equatorial current itself, and that it does not come wholly from 
the superheated water of the Gulf of Mexico. Some of the 
