836 OYSTERS, AND ALL ABOUT THEM. 



ence to be expected. With an approximately similar cur- 

 rent the specific gravity at a point will vary considerably. 



The condition of the water was found not to be 

 dependent upon the wind prevailing at any particular 

 time, but upon the wind that had prevailed ; while, except 

 in the neighbourhood of the inlets, the exact opposite was 

 (and is) the case with the currents. 



From a careful inspection of the determinations of 

 specific gravity and observations of winds and currents, the 

 following are deduced : 



Easterly winds will cause high water and high densities. 



Westerly winds will cause low water and low densities. 



Southerly winds will cause low water and low densities 

 in the southern part of Pamplico Sound, and high densities 

 in the northern part. 



Northerly winds will have an exactly opposite effect in 

 each locality. 



The greatest density and the highest water will be 

 found, after continued easterly weather 



In the northern part of the Sound, immediately before 

 the shift of the wind to N.W. 



In the southern part of the Sound, immediately before 

 the shift of the wind to the S.W. 



The strongest currents will be found immediately after 

 a shift of wind. 



The weakest currents will be found immediately before 

 a shift of wind. 



This portion of the coast is in close proximity to the 

 general track of cyclones, and an advancing circular storm 

 is always felt beforehand, through the influence of the 

 cyclonic wave, in increasing the height of the tides or 

 general level of the water. Hence an increase of density 



