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PROCEEDINGS OP THE AMERICAN ACADEMY. 



pocket beaches or bridging bars, as in the second and later outlines of 

 Figure 3. The initial irregularity of shore outline is thus replaced 

 by a graded outline; grade being first attained in the bays, and last 

 on the headlands, much as was the case with stream action. As the 

 headlands are cut farther back and beaches are formed at the base 

 of their cliffs, then the 'long-shore action is moi-e and more thrown 

 into one direction or the other from the chief headlands, transporta- 

 tion is carried on past many of the subordinate headlands, and much 

 of the waste finds its way into the chief re-entrants of the shore line, 

 as in the lowermost outline of Figure 3. We should expect to find 



Fig. 3. 



inside the long-sweeping curve of the aggrading shore line of the chief 

 bays more or less distinct record of the sharp-curved pocket beaches 

 of an earlier stage. 



However irregular the initial shore line was originally, and how- 

 ever many divisions were then made in the direction of the 'long-shore 

 currents, the time will come when only a few of the most prominent 

 and resistant headlands survive, as in the later outlines of Figure 3 ; 

 elsewhere the 'long-shore action is developed into a continuous move- 

 ment. Truly the direction of transportation along the graded shore 

 line is sometimes one way, sometimes the other, according to the 

 sweep of storm winds ; but if the dominant currents alone are con- 

 sidered, the movement is essentially constant. The graded condition, 



