PHYSICAL OCEANOGRAPHY OF THE GULF OF MAINE 
787 
southeastern part of the gulf and northward to the northern slope. It is possible 
that in some years the inflow may continue actively until late in August; but the 
data for 1913, 1914, and 1915 make it more likely that the indraft usually slackens 
by the first of July, if not earlier, when a progressive tendency toward the regional 
Fig. 150.— Salinity at a depth of 200 meters, July and August, 1912 to 1915 
equalization of salinity naturally ensues by various local circulatory movements of 
the water. It is also possible that slope water enters in much greater volume in 
some years than in others. 
