BY G. H. HALLIGAN. 



623 



which determine the contour of the shore-line in the vicinity. 

 Text-figures 1 to 4 will show how a projecting headland on this 

 coast may cause a counter current on its northern or southern 

 side, according as its northern side is concave or convex, or 





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-0 



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whether the headland is at right angles to the course of the 

 current or meets it at an angle. 



The importance of this and its influence on sand-movement 

 will be seen later on. 



