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THE ROYAL SOCIETY OF CANADA 



huge hydraulic pump which continually forces downwards immense 

 quantities of water. In spite of currents and tides which often run 

 faster than the drift of a berg, there must always be a tendency for 

 the berg to cool and sink a large proportion of sea water. The currents 

 must be considered, however, with reference to the density of the 

 sea water layers in which the berg is melting. 



Iceberg Melting in Salt Water. 



(1) Current of cooled sea water falling. (2) Current of warm sea water flowing 

 towards the berg. (3) Current of sea water diluted by water from melting berg. 



Density of the Surface Layers of the Sea. 



The Labrador current is of considerably lower salinity than the 

 Gulf Stream. This is shown by the following table which represents 

 conductivity measurements at various parts of the ocean, from Hudson 

 Strait to the mouth of Belle Isle Strait. 



