790 



BXTLLETIN OP THE BTJEEATJ OF FISHEEIES 



The constant tendency of the slope water to bank up against the eastern (Nova 

 Scotian) slope of the gulf as it drifts inward over the bottom has been mentioned 

 repeatedly in the preceding pages. The consequent concentration of the highest 

 salinities (34 per mille) in the eastern side of the basin, reappearing from month to 

 month on the charts for the deeper levels, is illustrated perhaps more clearly on a 

 profile running from the center of the gulf toward Cape Sable for August, 1914 (fig. 

 153), than on any of the others, though corresponding profiles for August, 1913 (Bige- 

 low, 1915, fig. 48), and for August-September, 1915 (fig. 154), show something of the 

 sort. On August 12 and 13, 1913, for example, the isohaline for 33 per mille in profile 

 revealed a very decided banking up in the mid-strata on the Nova Scotian slope off 



Stations 



Meter 



Fig. 163.— Salinity profile running eastward from the otBng ot Cape Sable (station 10243) toward the center of the Onlf of 



Maine (station 10249), for August 11 to 13, 1914 



the mouth of the Bay of Fundy (Bigelow, 1915, fig. 53), although not of the deepest 

 and most saline water. In 1914 this banking up involved the whole column of water 

 right up to the surface at the time of our cruise. In this region of such active tidal circu- 

 lation, however, sporadic vertical movements of this sort are to be expected; a pro- 

 file run a few days earlier or a few days later might have agreed more closely in this 

 respect with the profiles for 1913 and 1915. 



In 1913, 34 per mille water occupied the whole breadth of the eastern arm of 

 the basin. In 1913 and 1914, however, slightly lower salinities prevailed in its 

 western side, a difference reflecting a corresponding difference in the circulation of 

 water over the bottom for the preceding weeks. 



