PHYSICAL OCEANOGBAPHY OF THE GULF OF MAINE 



805 



Cape Ann, stations 10490 and 10503, fig. 164, and 33.93 per mille in the northeastern 

 side). However, the submarine rim of the Bay of Fundy, in the one side of the 

 gulf, and the partial inclosure of the trough west of Jeffreys Ledge, in the other, hinder 

 free exchange of bottom water in midwinter as effectively as they do in summer 

 (p. 776) , for the salinity was only 32.87 per mille at 150 meters to the west of Jeffreys 

 Ledge, contrasting with 33.75 per mille in the open basin to the east of it. The 



32 



.3 .4 .5 6 .7 .8 .9 33 



.4 .5 .6 .7 .8 .9 34 .1 .2 .3 4 



Meter 



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riQ. 164.— Vertical distribution of salinity in the western side of the basin in the offlng of Cape Ann. A, August 31, 1915 

 (station 10307); B, December 29, 1920 (station 10490); C, January 9, 1921 (station 10503) D, February 23, 1920 (station 

 20049) 



difference was nearly as great between the Bay of Fundy and the open gulf, off its 

 mouth, at this same level (32.75 per mille at station 10499; 33.37 per mille at station 

 10502). 



We have found this same general rule applying equally to the deep bowl off 

 Gloucester at all other seasons; but on December 29, 1920, the deep strata were 

 much more saline there (station 10489) than were corresponding levels in the open 

 37755—27 20 



