THE PRECIPITATION OF CALCIUM CARBONATE IN THE SEA. 



517 



above this depth they are higher, and differ from them and the open 

 ocean, north of the belt of calms, in the absence of a temperature 

 thermocline and in the maximum salinity being found below the sur- 

 face. The latter points either to a considerable local supply of fresh 

 water, or to a current of lower salinity from either the Florida stream 

 or the region of equatorial calms. Unfortunately we have no reliable 

 salinity observations for the two latter. 



The following section shows the vertical distribution of layers of 

 different salinities and temperatures at the two stations in dia- 

 grammatic form : — 



400 



800 -- 





1200 -- 



1600 .. 



Navxtical Miles. 



1^ 



\0 



"T" 

 20 



Fig. 2. — Section across the Tonfjue of the Ocean from Golding Cay, Andros Island east- 

 wards. Broken lines = isotherms, continuous lines = isohalines. 



