260 



EXTINCT TOLCANOS 



TIPPEIl 



Ga llery. 



Table-ease 

 in Recess 6. 



36.— * Grey ashes.— Monte Albano and Monte Artcmisio 



near Velletri. 



37 — *Eed ashes.— From the lava on the hills near San 

 Paolo, 3 1 miles from Rome. 



38. 



*\T 



Volcanic cinders, composed of pieces of scorice, 



earthy leucite. — Lake Nemi. 



39. — Fragments of volcanic 

 above Albano. 



cinders. — Monte Cavo, 



40. — Cinders. — Forming a part of Monte Cappuccini 

 near Velletri. 



41. — *Cinders.— From Monte Cimino, between Velletri 

 and Gensano. 



J' 



jfl 1 



afl 1 



42. — Pumice. — From Caprasola, east of Monte Cimino. 

 43. — Yellowish pumice. 



44.— Pumiceous lava, with included fragments of grey 

 scoriaceous lava, similar to the lava of the Phle°T£ean Fields 

 near Naples.— From the neighbourhood of Ronciglione. 



45. — Scoriaceous (approaching to pumiceous) lava, with 



included crystals of decomposed felspar. — Braccianesse. 



46. — Scoriaceous lava, slightly porous. 



Forming 



the base of the basaltic lava stream of Capo di Bove, 



near Rome. 



47. — Brown vesicular scoriaceous lava. Ticchiana, in 



the Campagna. 



48.— Grey vesicular scoriaceous lava.— From a rapidly 



A __..-__ gtream De l ow ^q mil | g Qn Lake Nemi< 



49.— Scoriaceous and vesicular lava, some of the 



cavities containing leucite. — From the summit 

 Malchio, near Velletri. 



Monte 



50. 



Reddish-brown vesicular scoriaceous 



Monte Cappuccini, near Velletri. 

 51.— Greyish lava. — Lake Albano. 



LAVA. 



• These are used, when mixed with lime, for making the cement 

 called Pozzuolana. ° 



JR 



in 



Po 





