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 Hne. South of Hatteras the surface tem- 

 perature is more uniform, Hke that of the stream itself, with a 

 far greater fall of temperature, 49i° 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 Bernini. 



