49 



of the rate of movement of the deep water because of the possible 

 division of what was originally one into two or more minima, and 

 because of our present ignorance regarding the tortuous path they 

 follow. 



For comparison, the two temperatures, upon which Wiist hypothe- 

 sized the existence of a Newfoundland Ridge, have been plotted 

 on figure 53. The potential temperature of 1.85° C, reported by an 



^ ..46 AT 4234 M. 

 / CAMBRIA, B. A. LIST 

 OF DEPTHS (1905) 



1.85 AT 4005 M. 

 UNNAMED SHIP, 

 B. A. LIST OF DEPTHS 

 (1918) 



Figure 53.— Potential bottom temperatures for depths greater than 1,500 meters. July 10- August ; 



unnamed ship in the British Admiralty List of Depths (1918) in 

 latitude 49°49' N., longitude 38°00' W., at a depth of 4,005 meters 

 hes somewhat outside the area surveyed but apparently is in good 

 agreement with our observations. The other temperature, 1.46° C, 

 reported by the Cambria in the B. A. List of Depths (1905) in latitude 

 51°34' N., longitude 41°43.5' W., at a depth of 4,234 meters, is not 

 in accord with our observations, except as to depth of water. Pos- 

 sibly the observation may have been made during the passage of a 

 temperature minimum produced in an unusually severe winter. One 

 cannot overlook_|^the possibility that if a Fahrenheit thermometer 



