W 90° 60° 30° 0° 30° E 



E 30° 60° 90°120°150° E 



E 150°ie0°150°120° 90° 60° W 



;g 60° 30° 0° 30° E 



Plate 5. Average sea-surface salinity {%„) of the world oceans. 

 (.SVf Vol. I. Pt. T, p. 161 (•/ .?«/.) 



