1859.] SCROPE CONES AND CEATEES. 



Fig. 21. — Plan of Volcano and Volcanello. 



543 



Fig. 22. — Summit of Vesuvitcs in 1774, showing cone within cone. 

 (From Sir W. Hamilton's ' Campi Phlegraei.') 



Fig. 23. — Summit of Vesuvius in 1777. (After Sir W. Hamilton.) 



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