OF THE PAPAL STATES. 



269 



184. — Aluminous rock.* — From the Old Cavern. 



185. — Alumstone* which has been roasted. 



186— Alumstone* which has been roasted and macerated 



in water 



187. 



Upper 

 Galleet. 



Table-case 

 in Hecess 6. 



rf commerce) 



from alumstone by roasting and macerating in water, from 

 which it has been deposited in crystals. 



188. 



/« 



From the mass composing the hills between Tolfa and the 



Alum Works. 



189— Altered eelspatiiic rock, with cubical crystals 

 of alumstone.— From the Alum Works near Tolfa. 



190. 



ifi 



olivine, &c— From the road to Bracciano. 



191. 

 tufa, I 



Monte 

 192. 



)f fragments of felspar, augite, 



From the Chian Hills, north of 



flic sand, with fragments of scoria, tufa, 

 lava, and augite.— From the base of Monte Cimino. 



193. — Sand, composed of minute grains of augite, leueite, 

 &c, forming a bed below the foundry, on the road to Lake 

 Bracciano. 



194. — White and brown calc spar, the latter probably 



discoloured by organic matter, accompanying the brown iron 

 ore (No. 162). 



195. — Clay. — From the decomposed trachyte of Monte 

 Cimino. 



196. — Grey calcareous pipeclay, used for making 

 pottery— From the Vatican Hill, south of St. Peter's, in- 

 side Borne. 



197. — Fetid limestone (stinltstone).— From the peperino 



of Monte Albano. 

 198— White 



the Peperino of Monte Albano. 



{melamorph ic limestone). — From 



at Tolfa, near Civita Vecchia. 



ghbourhood of the Alum 



