132 



THE CHEMISTRY OF CREATION. 



acid, and holding a large quantity of calcareous 

 matter thus obtained, occurs in a lake existing 

 in the Campagna of Borne, called the Lacus 

 Albula, or the Lake of the Solfatara. The water 

 is so impregnated as to assume a bluish, milky 

 aspect. The ancient Romans erected their baths 



PETRIFYING SPRINGS. 



here, which were celebrated for the cure of dis- 

 orders of the skin. The temperature of the 

 water is about twenty degrees higher than the 

 average or mean temperature of the air. " Reeds, 

 lichens, confervae, and a vast mass of aquatic 



