123 



NOTE ON THE PLATES 



Plates II-XLIII show the distribution of temperature, salinity and oxygen content, in vertical 

 sections along the lines marked sections i to 19 on the circumpolar chart in Plate I. The temperatures 

 are always expressed as ° C, the salinities as °/ 00 according to Knudsen's Tables (1901), and the 

 oxygen contents as c.c. per litre. 



Each of the sections, except 2 and 19, has been drawn projected on to a meridian so that the 

 horizontal distances do not represent actual distances along the sections but only differences of 

 latitude. The latitude and depth scales have been maintained the same throughout so that the 

 sections are comparable ; the exaggeration of the vertical scale with respect to the horizontal scale 

 is approximately 370 to 1. In sections 2 and 19, which run almost west to east, a longitude scale with 

 approximately the same relation to the depth scale has been used. 



The bottom profiles are only schematic, constructed after a preliminary examination of the 

 soundings, but in their main topographical features they are likely to prove fairly accurate. 



The letters AC and STC above the sections mark the positions of the Antarctic and subtropical 

 convergences. 



