101 



VOLCANO 



J O R U L L O. 



PLATE XLIII. 



The plate of which I am now about to give an 

 explanation recalls to mind one of the most sin- 

 gular catastrophes in the physical history of our 

 planet. Notwithstanding the frequent commu- 

 nications between the two continents, this catas- 

 trophe has remained almost unknown to the 

 geologists of Europe. I have already given a 

 description of it in my political Essay on the 

 Kingdom of New Spain *. 



The volcano of Jorullo is situate, according to 

 my observations, in latitude 19° 9', longitude 

 103° 5 r 48", in the intendencyof Valladolid,tothe 

 west of the city of Mexico, and thirty-six leagues 

 distant from the ocean. Itis513metres (263toises) 



* Tom. 1, p. 248. See also ray Collection of Astr. Obs. 

 t. 1, p. 327, & torn. 2, p. 52L 



