EXPLOEATIONS, WESTEBN ATLANTIC, STEAMER BACHE, 1914. 89 



the water between 700 and 1,300 meters 1°-1.5° colder; and in the 

 center of the channel (fig. 42) the water was considerably colder in 

 the middepths in 1878, the warm band so notable in the Bache 

 profile being absent. Consequently, the temperature curves in the 

 Blake profile (Agassiz, 1888, p. 231, fig. 157) dip more regularly from 

 north to south. 



LITTL^--.-; 

 BAHAMA 

 \BANK 



GREAT 



HAMA 

 BANK 



CUBA 



Fig. 39.— Temperature at 600 meters in the Straits of Florida, March, 1914. 



The Blake profile (Agassiz, 1888) on the Cape Florida-Gun Cay 

 line shows that water colder than 10° was much nearer the surface 

 in 1878 than in 1914, although the temperature in the bottom of the 

 channel was very nearly the same (5.5° to 6.1°) for the two years. 

 Near the surface, however, the Blake temperatures taken in May 

 were higher than the Bache readings in March, the temperature sec- 



