144 ^/^^ Natural tiiflory Part IIL 



more or lefs, troubled with Earth- 

 quakes ; yet, were Vulcano^s 

 wanting, they would be much more 

 troubled with them than now they are : 

 yea in all probability to that degree, 

 as to render the Earth, for a vaft Ipace 

 around them, perfectly uninhabitable. 

 In one word, lb beneficial are thefe to 

 the Territories where they are, that 

 there do not want Inftances fome 

 which have been refcued and wholly 

 delivered from Earthquakes by the 

 breaking forth of a new Vulcmo there ; 

 this continually dilcharging that Mat^^ 

 ter, which, being till then barricaded 

 up, and imprifbned in the Bowels of 

 the Earth, was the occafion of very 

 great and frequent Calamities. That 

 moft of thele Spiracles perpetually and 

 at all Sealbns fend forth Fire, more or 

 lefs; and though it be fbmetimes fb 

 little that the Eye cannot dilcern it, yet 

 even then, by a nearer A pproach of the 

 Body, may be dilcovered a copious and 

 very fenfike Heat continually iffuing 

 out. 



14. That the Thermay Natural Baths, or 

 Hot Springs, do not owe their Heat to 

 any Colluftation or EfTervefcence of 

 the Minerals in them, as fbme Natu- 



ralifts 



