PLATE 3. 



Chart of the Northern Ocean, shewing the temperature and salinity on the surface during March and April 1897. 

 The Isotherms are printed in red. 



The black lines indicate the routes on which observations were made. The Surface Observations are denoted by cross lines, 

 the Deep Sea Sounding Stations are indicated by small circles. 



See also the Hydrographical Tables B, III IV, pp. 11 15. 



