EXPLORATIONS, WESTERN ATLANTIC, STEAMER BACHE, 1914. 27 
Water warmer than 24° was confined to the southern and western 
part of the channel, and the water in the Old Bahama Channel was 
probably as warm as 24°, while the surface was fractionally cooler 
along the western face of the Bahama Bank. At the northern end 
of the channel the surface temperature was 23.6°-23.7°, and it was 
considerably cooler east of the Bahama Bank, as pointed out (p. 6). 
Thus, the inequalities in surface temperature are gradually dissipated 
from west to east and north, the temperature range diminishing 
from 4° off Habana to practically zero off Jupiter Inlet. As a whole, 
the Straits were considerably warmer on the surface than the Atlantic 
water east of the Bahama Bank. 
Salinity; %o 
MS 6 oe eS 
Retail | TSS 
sEreesneiace 
se Scene 
Seeue5 
Meter 0 
100 
Spee Ao 
re a ei Lis, 
LIBEL 
S2P Sees 
[Pane ee & 2 a 
22 SRERSaR See eeeee 
1200 
Fic. 23.—Salinity sections on the line Key West-Habana; stations 10197, 10199, 10200. 
The surface salinity was much more uniform than the surface tem- 
perature, the extreme range over the whole length of the channel 
being about 0.27°/,. only (35.9° to 36.17°/,.). 
The serial observations on the Key West-Habana line (fig. 22, 23) 
show that off Key West the water cooled from nearly 21° on the 
surface to 11° at 200 meters; 20 miles farther south from 23° to 14°; 
in the center of the channel only from 23.5° to 22° in the same depth. 
Below that depth the curves of the temperature sections on this line 
approach each other, the temperature range at 900 meters being 
only 1.5° (7°-8.5°). The warmest station was in the center of the 
Strait (station 10201). Unfortunately, serial water samples were 
taken at only three of these five stations (none at station 10201, 
perhaps the most interesting of all). However, they show that the 
salinity was lowest immediately off Key West (station 10197), and 
