232 



THREE CRUISES OF THE '' BLAKE. 



tions, showing that the temperature ^ of the outflow of the Gulf 

 Stream across the Straits of Bemini is the same as that of the 

 mass of water which Hes to the westward of it. As it was con- 

 clusively proved by Professor Mitchell in 1867 that the current 



Sapenorida a 



S -i Gpn Key TTfTil, 

 ^.g]^^ ( GreatB aliasaa B ankj 



Fig. 158. 



of the Gulf Stream extended to the bottom in the section be- 

 tween Havana and Key West, it is impossible any longer to 

 account for the cold water of the sections across the Straits of 

 Florida by an inflowing of cold water under the warmer water 

 across the Straits of Bemini. As a further confirmation of this, 

 we have the temperature of sections of the Gulf Stream taken 

 off Jacksonville (Fig. 159), north and south of Cape Canaveral 



^ I copy from Commander Bartlett's Report the cross-section taken by the 

 " Blake " between Jupiter Inlet and Memory Rock : — 



" At anchorage near Memory Rock, in four fathoms water. Surface, 78^ ; bottom, 

 78°. 



5 miles. Surface, 



5 



^ 



5 



2f 



2^ miles from shore. 

 " The area of this cross-section is 429,536,240 square feet, and, assuming the velo- 

 city at three knots, the delivery per hour would be 51,028,905,312,000 gallons." 



