30 EXPLORATIONS, WESTERN ATLANTIC, STEAMER BACHE, 1914. 
at 200 meters, below which level there is a rapid decrease of salinity 
to 34.85°/,, at 800 meters in the center of the channel, and to 35.5°/o0 
at 700 meters off Gun Cay. 
At all three stations along this line the vertical cooling was rapid, 
the temperature dropping off Cape Florida from 21° to 10.5° in a 
Salinity; %o 
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Fic. 27.—Salinity sections on the Gun Cay-Cape Florida line; stations 10202, 10203, 10204. 
distance of 50 meters; from 24° on the surface to 6° at 800 meters 
in the center of the channel; from 23° to 12° in 700 meters off Gun 
Cay. The temperature profile (fig. 28) shows no trace of the warm 
tongue so conspicuous between Key West and Habana, and the 
warmest water (24°-25°) was on the surface in the center of the 
Stations 
204 eee 20a 202 
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Fic. 28.—Temperature profile across the Straits of Florida, Gun Cay-Cape Florida. 
channel, instead of on the Bahaman side, besides being fractionally 
cooler than the highest surface temperatures off Habana. The 
banking up of water colder than 10° and fresher than 35°/,, 
against Florida is even more pronounced than in the preceding , 
profile, water with these characteristics rising to within about 175 
