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not Jjhef ] and folving Objeftions alledged agaiiift it 
TenthlyXit concludethjthat fioce, by his calculation, the up- 
per part of Mount j£tna hath been juft fo much depreffed, as 
themafsoffand and (tones ejcdted amounts to, this mafs was 
furnilli'c by the Mountain it felf, and from the Earth and Sands 
thereof produced and vitrified : v/here he taketh pains to make 
n appear^how all that prodigious quantity of matter, thrown 
out both now and informer ages, and feeming fax to exceed 
the bulk of this whole Mountain, could be furnifh't by j£tna it 
felf, and yet the fame not be quite levelled with the ground: 
The like of which he confiders of Mount Vefuvim. 
Eleve7nhly^\\t taketh particular no tice^that, whereas the Fires 
were foon extinguifh'c in the place of the very Pit of the Sulphur 
and Bitumen, yet they, lafted long in other places, that were 
waterifli and deftitute of combuftible fatne/s 5 endeavouring 
to render a rea(on of this ph^zmmenon. 
Twelfthfy^ heinfertsan Obfervation of great plenty of Sal 
\/frmoniac,C2L^ out in this Incendmntyy^hichyhe. faith, was feeo ad- 
hering both to the corners and alperities of the Sciarra, and to 
the fides of the rents made in thofe huge ftones, which the e- 
jedted matter was at length hardned into. And of this Salt he af- 
ficmsjthat there had been fublimed, (for he makes it faSuious^ 
fo great ftore, that many thoufands of pounds might bega* 
thet*d 5 addingjthat even a whole year after the extinction of 
the Fire in the Mouth's of jEtna^ there were found remaining 
divers vents about Catania^cxhalin^ ftore of fmoak, which had 
the like Sal Armoniac flicking to the fides and edges of the 
Stones* 
LaJlly^hQ rejedeth the opinion of thofe,that will maintain the 
^tnean Fires to have been perpetual and never extinguifh'd, 
aflerting the frequent ceffation of them, and withall aflSgning 
thecaufeof that cefTation, as well as that of their renovation* 
Concerning which^and many other confiderable remarks and 
refie6tions,toomany tobe here recited, we refer the Reader 
to the Book it felf* 
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