52 EXPLOEATIONS^ WESTERN ATLANTIC, STEAMER BACHE, 1914. 



Foundland. But whether the water thus manufactured tends to 

 sink, or float, depends on the density resulting from the precise 

 temperatiu-e and salinity at any given locality, compared to that of 

 the upper 300 meters or so in the warmer, but Salter, water east of it. 

 And, unfortunately, the relative densities of the two, off our coasts, 

 are only known o£f Chesapeake Bay, and along a profile some 40 miles 



Meter 



Stations 



44 



45 46 



Fig. 51.— Temperature profile across the continental shelf off Chesapeake Bay, January, 1916 (^Eoo%tve\i 

 stations 8442, 8443, 8444, 8445, 8446). 



east of Cape Cod, run by the Grampus in July, 1914, none of our 

 other profiles across the slope having reached the undiluted ocean 

 water. The density of the mixed water, however, is fairly well known 

 for the sumiiier season from Chesapeake Bay to Nova Scotia (Bige- 

 low, 1915). But comparison l)etween the two waters may fairly be 

 extended bevond these actual records, for it is safe to assume that 



