101 



VOLCANO 



OF 



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° 5V 48", in the intendency of Valladolid, to the 

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

 distant from the ocean . It is 5 1 3 metres (263 toises) 



* Tom. 1, p. 248. See also my Collection of Aatr. Obs. 

 t, 1, p. 327, & torn. 2, p. 521. 



