TRUE VOLCANOES. 247 



The volcano of Izalco, 19 in the state of San Salvador (in Central 

 America) which was first ascended in the year 1770, and which 

 is in a state of almost constant eruption : 2132 feet, according 

 to Squier. 



Gunung Ringgit, the lowest volcano of Java : 2345 feet, according to 

 Junghuhn. 20 



Stromboli: 2958 feet, according to F. Hoffmann. 



Vesuvius, the Rocca del Palo, on the highest northern margin of the 

 crater : the average of my two barometrical measurements- 1 of 1805 

 and 1822 gives 3997 feet. 



The volcano of Jorullo, which broke out in the elevated plateau of 

 Mexico- on the 29th September, 1759: 4266 feet. 



Second group, from 4000 to 8000 Paris or 4264 to 8528 

 English feet in height. 



Mont PeU, of Martinique : 4707 feet, according to Dupuget. 



The Soufriere, of Guadaloupe: 4867 feet, according to C. Deville. 



Gunung Lamongan, in the most eastern part of Java: 5341 feet, 

 according to Junghuhn. 



Gunung Tengger, which has the largest crater 23 of all the volcanoes of 

 Java: height at the cone of eruption of Bromo, 7547 feet, accord- 

 ing to Junghuhn. 



The volcano of Osorno (Chili): 7550 feet, according to Fitzroy. 



The volcano of Pico 24 (Azores) : 7614 feet, according to Captain 

 Vidal. 



The volcano of the island of Bourbon: 8002 feet, according to 

 Berth. 



19 Squier, in the tenth annual meeting of the American Association, 

 Newhaven, 1850. 



20 See Franz Junghuhn's exceedingly instructive work, Java, seine 

 Gestalt und Pflanzendecke, 1852, Bd. i, s. 99. Ringgit has been nearly 

 extinct, since its fearful eruption in the year 1586, which cost the lives 

 of many thousand people. 



21 The summit of Vesuvius is, therefore, only 260 feet higher than 

 the Brock en. 



22 Humboldt, Vues des Cordilleres, pi. xliii, and Atlas geogr. et 

 physique, pi. 29. 



* 3 Junghuhn, Op. cit. sup. Bd. i, s. 68 and 98. 



24 See my Relation ffistorique, t. i, p. 93, especially with regard to 

 the distance at which the summit of the volcano of the island of Pico 

 has sometimes been seen. Ferrer's old measurement gave 7918 feot, 

 and therefore 304 feet more than the certainly more careful survey of 

 Obtain Vidal in 1843. 



