( '54 ) 



ufuaJly general and wonderful^ but little 

 injlnicl'ive — Volcanic glafs found in Ice- 

 land^ but by no means in ftifficient quantities 

 to form mountains — No notices of vitrifi- 

 cations in the volcanos of the iflands of 

 Ferro, nor in thofs of Norway and Lap- 

 lafid — Little or no glafs in the volcanized 

 countries of Ger7nany and Hungary — Nor 

 in the extinguifjed volcanos of France — 

 The quantity of vitrif cations at Vefuvius, 

 and fever al other parts of the Neapolitan 

 territory^ more cojfiderable— Scarcely any 

 at Mount Etna, or the volcaitic mountains 

 cf Padua — A more extenfive trad of pU" 

 mices found perhaps in 7io part of Europe 

 than in the ifland of Santorine — This 

 ijland^ hotvever, affords no glafs — Great 

 fcarcity of vitrif cations in the three other 

 quarters of the globe— Concluf on : that 

 Vulcano and Lipari offer a greater abund- 

 ance of glaffes than any other volcanized 

 part of the world ; but that Santorine ex- 

 ceeds them in the quantity of pumices — 

 Enquiries relative to this fcarcity of vitri- 

 fications in volcanos^ whether hur'niv.g or 



extinEl 



