Ch. xxiv.] 



VOLCANIC ERUPTIONS OF ISCHIA. 



599 



ffio-. 60) . Within the space above limited, the volcanic force 

 ; s sometimes developed in single eruptions from a consider- 

 able number of irregularly scattered points ; but a great part 

 f its action has been confined to one principal and habitual 

 vent Vesuvius or Somma. Before the Christian era, from 

 the remotest periods of which we have any tradition, this 



)1- 



>re 



of 



on 



nd 



ect 



[is- 

 les, 



011- 



en- 

 lis- 

 ts 



e 



aits 



itan 



slds, 



en*? 

 1 be 



P 



les 



Fig. 60. 



Ar Avers a 





X.Jlrerna ''' 



Floria $ 





No! a 



jgSoiuma 



* ^ M,%M ^otlaiaiio 



■a _ 



Unite 



JYisidu 



Capo diMiseno 





«*r_S 



* 





Toi-rcdelGrec 



t$3 



•i"„! 







imocmA. 



^CB^ 



A 



Torre A*J 



Castcll a Mare Av 



"",. 



5^« 



%***«► 



Vico A 



is** 



VOLCANIC DISTRICT 



r«r/>0 cliSoivciilo 



^BSgifenaHt , 





OF 



NAPLES. 





P':° cliCampancllo 



*-£cAt* 



\ 





A. Astroni. 



B. Monte Barbaro. 



M. Monte Nuovo. 



S. The Solfatara. 



But terrific 



principal vent was in a state of inactivity. 



convulsions then took place from time to time in Isclna 



seem 



abo* mentions a story of 

 from Ischia : and Plinyf 



name Irom 



from 



circumference 



is eighteen miles, its length from west to east about five, and 



from north to south three miles 



Several Greek 



colonies which settled there before the Christian era were 

 compelled to abandon it in consequence of the violence of the 



* Lib. v. 



f Nat. Hist. lib. iii. c. 6. 





