1 4<5 Tlje Natural Hiftory Part IIL 



fame Spring fufFering at fome times a 

 very manifeft Failure and Remiffion of 

 its Heat ; at others as manifeft an Ad- 

 dition and Encreafe of it ; yea fome- 

 times to that Excels as to make it boil 

 and bubble with extream Heat, like 

 Water when boyling over a common 

 Fire. That particularly during Earth- 

 tF/^xo«/: quakes, and Eruptions of Vulca^o's 

 fu^a^^*^* when there is a more copious Acceffion 

 of this fubterraneous Fire, tht Thermae 

 all thereabouts become much hotter 

 than before: y eliding alio a far greater 

 fupply of Water than they were wont 

 to do : and a murmuring Noife is ufix- 

 ally heard, below them, in the Bow- 

 els of the Earth ; all which is occafiour 

 ed meerly by the then rapid Motion, 

 and Afcent of the Fire, in greater 

 plenty than before, to the Apertures 

 of thefe Springs. 



I have now finifh'd the Account of 

 this Sedion : and was juft going 

 take off my hand here ; but recolle£|- 

 ing that i a the foregoing Part of thif 

 i Work 11 1 promifed fome tuvther Proofi 



of Contrivas^ce in the Structure of the 

 Globe we dwell upon : and fuch too a$ 

 piay fatisfie any fair and unbyalsM 

 Spedator that the framing and Coni- 



pofitioa 



