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CHAPTER XXIV. 



VOLCANIC DISTRICT OF NAPLES 



HISTORY OF THE VOLCANIC ERUPTIONS IN THE DISTRICT ROUND NAPLES 



EARLY CONVULSIONS IN THE ISLAND OF ISCHIA -NUMEROUS CONES THROWN 



UP THERE — LAKE AVERNUS — THE SOLFATARA — RENEWAL OF THE ERUPTIONS 



OF VESUVIUS, A.D. 79. — PLINY'S DESCRIPTION OF THE PHENOMENA HIS 



SILENCE RESPECTING- THE DESTRUCTION OF HERCULANEUM AND POMPEII 



SUBSEQUENT HISTORY OF VESUVIUS LAVA DISCHARGED IN ISCHIA IN 1302 



PAUSE IN THE ERUPTIONS OF VESUVIUS MONTE NUOVO THROWN UP — 



UNIFORMITY OF THE VOLCANIC OPERATIONS OF VESUVIUS AND PHLEGRiEAN 

 FIELDS IN ANCIENT AND MODERN TIMES. 



* 



* 



I shall next give a sketch of the history of some of the vol- 



canic 



vents dispersed throughout the great regions before 

 described, and consider the composition and arrangement of 

 their lavas and ejected matter. The only volcanic region 

 known to the ancients was that of the Mediterranean ; and 

 even of this they have transmitted to us very imperfect 

 records relating to the eruptions of the three principal dis- 

 tricts, namely, that round Naples, that of Sicily and its isles, 

 and that of the Grecian Archipelago. By far the most con- 

 nected series of records throughout a long period relates to 

 the first of these provinces ; and these cannot be too atten- 

 tively considered, as much historical information is indis- 

 pensable in order to enable us to obtain a clear view of the 

 connection and alternate mode of action of the different vents 

 in a single volcanic group. 



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Neapolitan 



volcanos extend from Vesuvius, through the Phlegreean Fields 



to 



som 



from 



what linear arrangement, 

 north-east to the south-west, as will be 

 )d map of the volcanic district of Naples 



VOL 



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