14 EXPLORATIONS, WESTERN ATLANTIC, STEAMER BACHE, 1914. 



depths between 500 to 1,500 meters, the extreme range at 1,200 

 meters being only Tjoo (34.8-35.5Voo). The sahnity of the mid- 

 depths, like the temperature, was highest west of Bermuda, where 

 water of 35.2 per cent was encountered at about 1,500 meters; 

 lowest north and northeast of the Bahama Bank (stations 10193, 

 10210, 10212) and in the northeast Providence Channel (station 

 10196), where water of this salinity was within 700-800 meters of 

 the surface. So far as I can learn, no serial salinities have pre- 



Salinity; fw 

 34.9 35 .1 .2 .3 .4 .5 .B .7 .8 .9 36 .1 .2 



.3 .4 .5 .6 .7 



Meter 



100 



200 



300 



400 



500 



600 



700 



800 



900 

 1000 

 1100 

 1200 

 1300 

 1400 

 1500 

 1600 

 1700 

 1800 



Fig. 8.— Salinity sections on a line running 200 miles southwest from Bermuda; stations 10179, 10181, 10183. 



viously been taken by modern methods in the region in question, 

 the Challenger records being aU open to suspicion because of unre- 

 liable water bottles. 



TEMPERATURE AND SALINITY PROFILES. 



The profile from Chesapeake Bay to Bermuda (fig. 11) is neces- 

 sarily interrupted between stations 10161 and 10163, owing to the 

 zigzag course followed. (See chart.) On this line water warmer than 

 20° was confined to a narrow surface belt just east of the 1,800-meter 

 contour on the continental slope (station 10161), with a secondary 



