PHYSICAL OOEANOGEAPHY OF THE GULF OF MAINE 



949 



With this gradient a considerable indraft is radicated into the eastern side of 

 the gulf; not, however, from the coastal belt to the eastward of Cape Sable, but 

 from the region of Browns Bank and of its offing. Probably this indraft had as a 

 counter current an outdraft from the gulf around the eastern end of Georges Bank, 

 though, lacking a station on the bank, this can not be asserted definitely. It is 

 certain, also, that the dynamic impulse for a northeast-southwest current around 

 the northern and western margins of the gulf had slackened by the middle of that 

 June. 



Unfortunately, no observations were taken in the western side of the gulf that 

 June, but a survey of Massachusetts Bay carried out by the Fish Hawlc on June 16 



44' 



Fig. 197.— Dynamic gradient at the surface of the eastern side of the gulf, from June 10 to 26, 1915, referred to the Eastern 

 Channel as base station. Curves are for every dynamic centimeter. 



and 17, 1925 (cruise 14), has enabled Mr. Parmenter to calculate the relative 

 velocities and directions of the gradient current on various profiles by the method 

 elaborated by Sandstrom (1919), and his results are offered here to illustrate this 

 alternative procedure. 



These calculations (tabulated below) rest on two assumptions — first, that the 

 water was stationary at the greatest depth of the shoaler of each pair of stations, 

 and, second, that the profiles selected (typical examples are shown in fig. 198) are 

 at right angles to the existing current. In the present instance neither of these 

 requirements is exactly fulfilled, but the close agreement between the calculation 



