BIGELOW: EXPLORATION'S OF THE COAST WATERS. 



167 



the previous year the 20° curve probably followed the 200 meter 

 contour as far west as Longitude 70°, in July. But by the end of 

 August a" surface temperature of 20° was found within fifteen miles 

 of Marthas Vineyard. The very cold water off Cape Sable, noted 

 above, was only a local phenomenon, associated no doubt with vertical 

 currents, for the temperature was higher (10°-12°) along the southeast 

 coast of Nova Scotia. 



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Fig. 1. — Surface temperature, July-August 1914. 



Temperature Sectiom. — Temperature and salinity sections are 

 chiefly interesting as the basis for the profiles, and charts for different 

 levels. The temperature curves for the Gulf of Maine are of the same 

 general types as in 1913 (1915). Thus both in the eastern and in the 

 western basins the water was coldest in the mid-depths (about 100 

 meters) ; down to which level vertical cooling was very rapid at all the 

 deep Gulf stations, most so in the western part (Fig. 2). 



