BIGELOW: EXPLORATIONS OF THE COAST WATERS. 



199 



probably including Nantucket Shoals, as well as the northern half of 

 Georges Bank. And Le Have Bank was also fresher than 33%o on the 

 bottom. On the other hand bottom water salter than M%o corre- 

 sponds, though not precisely, to the deep basin of the Gulf, and in- 

 cludes the deep basins off Halifax (34.-34.9%o)- But the bottom 

 of the shallow Brown's Bank was almost equally salt (34.2%o), a 

 phenomenon connected with the intrusion of water of high salinity 



Fig. 36. — Temperature on the bottom, July-August, 1914. 

 •in = 2° - ; ; : ; = 2° - 5°; ^ = 10° + 



via the Eastern Channel (p. 196), which also raises the bottom salinity 

 of the southeastern corner of the Gulf above 3o%o- The bottom 

 water along a narrow belt following the continental slope between 

 the 100 and 250 meter contours, was likewise salter than 35%o- 

 Farther down the slope, however, the bottom salinity was lower, 

 corresponding to the depth, and we found no bottom water as salt as 

 So%o east of the Eastern Channel. 



