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BULLETIN OF THE BUREAU OF FISHEBIES 



locally increasing the density at the surface but correspondingly decreasing that of 

 the underlying strata. 



At some time between the last of March and the first of May — the exact date 

 varying from year to year (p. 832) — the Nova Scotian current, flooding westward 



Fig. 194.— Distribution o! density at the surface of ttie gulf for May, 1915 (underlined), and May, 1920, combined 



past Cape Sable into the gulf, is reflected by the development of a corresponding 

 tongue of low surface density extending westward from the offing of the cape. 

 Thus, in 1919 the eastern half of the Cape Sable-Cape Cod profile proved less dense 

 than the western in the upper 50 meters at the end of- March and again at the end 



