NAl^URE OF POCKET-BEACHES 



53 



across the intervening shallow sea to the niari^in of the main- 

 land. On the more extended coasts of such mainlands, these 

 indentations which catch the waste of the shores, and which 

 we may for convenience term pocket-beaches, are, wherever 

 the rocks are of varied hardness, of very common occurrence. 



Eastern Shore of Cape Ann 

 Showing small re-entrant with pocket-beach. Thatcher's Island in the distance. 



Along the rocky shore of New England they are to be num- 

 bered by the thousand. 



If, after studying the phenomena exhibited by any charac- 

 teristic pocket-beach, the student will compare the forms of 

 a number of them, he will see that the> — while agreeing in 

 all the general features which we have already considered — 

 differ much in certain important details of lorni. The most 

 strikine variation is in the measure of the incurve which 



