PHYSICAL OCEANOGRAPHY 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 
Fig. 164.— Vertical distribution of salinity in the western side of the basin in the offing 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 
8951—28 52 
