240 THREE CRUISES OF THE “ BLAKE.” 
Hatteras, where the Gulf Stream and the northern current meet, 
we find temperatures of 79° and 60° at the surface, in depths of 65 
and 1,000 fathoms, and a bottom temperature of 38° near the 
one-thousand-fathom line. South of Hatteras the surface tem- 
perature is more uniform, like that of the stream itself, with a 
far greater fall of temperature, 493° at 178 fathoms, 39° at 464 
fathoms, and 37° at 1,632 fathoms, until we reach the lines 
farther south, where, for the whole extent of the Gulf Stream, 
in its northern extension along the Blake Plateau, we have a 
bottom temperature of 44° at a depth of 400 fathoms, corre- 
sponding to the temperature, at the same depth, of the Gulf 
Stream when it passes through the Straits of Bemini. 
