( 45 ) 



baths, of which we ihall fpeak below, ard 

 the only places in the whole illand where 

 any figns are to be found of as yet unex« 

 tinguifhed volcanos* 



M. Dolomieii, after having defcribed the 

 Stoves of Lipari, proceeds to fpeak of the 

 alterations caufed by the fulphureous-acid 

 vapours on the lavas of this place, remark- 

 ing that all of them, befides having become 

 fofter and lighter, have loft their primitive 

 colour, and affumed a w^hite tinge, mixed 

 with yellow, red, violet, and other colours, 

 which the oxides of Iron ufually produce. 

 He obferves likewife, that they are coated 

 ■with a thick cruft of fulphates of lime (fele- 

 pite or gypfum), which fulphates penetrate 

 likewife to the internal parts, and that fome 

 lavas are covered with that kind of iron ore 

 which is called filmy (f^ingofa) or bog ore. 

 He then very ingenioufly explains in what 

 manner, by means of a combination of the 



mrnns of fulphureous fumes, and the quantity of ful- 

 phates of lime, which I fliall prcfently have occafion 

 to tlefcribc. 



fulphuric 



