PHYSICAL OCEANOGRAPHY OP THE GULF OF MAINE 
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to reach its maximum for the year in October (as in 1917) or November-December 
(as in 1916)— an annual difference no greater than might be expected in any coastal 
region where the precise salinity is so largely governed by the volume of river water. 
Fig. 165 .— Seasonal variations of salinity in the Bay of Fundy, August, 1916, to December, 1917, at the surface, 50 
meters, 100 meters, and 175 meters, constructed from Mayor’s (1923) tables 
During the remainder of the year the surface salinity of this part of the bay is 
comparatively uniform. 
Vernal freshening is progressively less and less effective with increasing depth, 
so that the salinity of the 50-meter level decreased only by about 1.2 per mill© 
