BIGELOW: EXPLORATIONS OF THE COAST WATERS. 



217 



middle of June the discrepancy between the surface readings on the 

 two sides was upward of 6° (12°-14° in the Western Basin, 6°-8° on 

 German Bank, and along the west coast of Nova Scotia, Fig. 55). 

 But in the mid-depths, the western side of the Gulf lags behind its 

 central and southeastern parts in summer warming (Fig. 56, 57), 

 which results in the reestablishment of one of the most important 

 features of summer, i. e. the fact that the eastern part of the Gulf is 

 warmer than the western, except for the immediate surface. 



Fig. 59. — 40 meter temperature, August 31-September 7, 1915. 



The deeper levels are particularly interesting at this season, because 

 our work extended far enough east to reach the undiluted Cabot Cur- 

 rent, which was not the case in May. At 40 meters the influence of 

 the current was e\'ident (Fig. 56) across the whole of the continental 

 shelf abreast of Shelburne in very low temperature (.7°-2.87°), and 

 in the shelf-like projection of water colder than 5° beyond the slope, 

 at the 70-80 meter-level, with higher temperatures below, as well 

 as above it (Fig. 73) the same as in summer (p. 174). And the tern- 



