20 2 T'he Natural Hijlary Part IV. 



mounted up, and affix to the Walls 

 and Roofs, incruft them over, and, 

 being ftopM and reverberated thereby, 

 form Stalacfiu, or Sparry Icey cles hang- 

 ing down from the Arches of the Grot- 

 toes, from the Capitals of the Pillars, 

 and Roofs of the Buildings. That 

 where thefe Therm<e are not thus co^ 

 vered and vaulted over, fb that the 

 mineral Matter is not ftop'd and hin- 

 dered in its Afcent, a great part of it 

 advances direftly up into the Atmo- 

 fphere. 



That the Heat which is difcharged 

 out of the Earth at the time of l^arth^ 

 |p^rn- qt^^kes II brings forth Nitre, Sulphur, 

 seB I. and other mineral Matter along with 

 JlJ. it. That the Water alfo which is at 

 & 141- the fame time fpued out % through 

 the Cracks or Chafmes opened by the 

 Earthquake, and through the Aper- 

 tures of Springs and Rivers, is turbid 

 and ftinking, as being highly faturated 

 with mineral Matter. That the Act" 

 duU^ or Medical Springs emit then like- 

 wi(e a greater quantity of their Mine- 

 rals than ufual : and even the ordina- 

 ry Springs^ which were before clear^ 

 frefii, and Hmpid, become thick and 

 turbid, and are impregnated with Sul- 

 phur 



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