54 TRAVELS THROUGH 



gone fherl-cryftallizations i which, for good rea- 

 fbns, might be called white garnets. 



Near this Montagna di Lovegno, in the lower 

 hills di S. Ulderico di fretto, wherein, in former 

 times, have been many filver mines, they dig that 

 white potters and china-clay, which ferves for cru- 

 cibles in the Aftfnzw-glafs- manufactories, and is 

 employed in the china-manufactories at Venice and 

 Florence. The whole country is volcanic ; and 

 Mr. Arduini is of opinion, that former eruptions 

 pf the Monte di Lovegna have vomited this clay 

 with much water ; and that it is but a fine diflb- 

 lurion of the inferior deeper flate, becaufe it con- 

 tains many mattered flate and quartz-pieces, and a 

 good deal of the coarfe glimmer flakes, which are 

 mixed into its fubftance. He ranks, likewife, 

 .among the aqueous or humid volcanic eruptions 

 and their productions, the hard red bolus, which 

 is found in a volcanic bed under thefeaglta in monte 

 di S. Pancrazio, on the road from Barbarano to 

 Ponte di Mo/ano ; and, for the fame reafon, all 

 fuch red, blue, yellow, and cinericious boles, 

 which are found in many volcanic tracts o 

 Vicenza. Thefe boles are extremely fat to the 

 touch ; and, if diflblved in water, they depofit a 

 fine iron fand, which is drawn by the load-ftone, 

 and very common in the volcanic parts of Vi- 

 cenza ; whence, by rain, it is wafhed out, and 

 dcpofited in its rills and rivulets. 



It 



