EXPLORATIONS, WESTERN ATLANTIC, STEAMER BACHE, 1914. 39 
the water between 700 and 1,300 meters 1°-1.5° colder; and in the 
center of the ehannel (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. 
Fic. 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- 
