244 J, Orton on the Andes of Ecuador. 
tar and Rumifiagui, the western wall is lower than the eastern. 
Cotopaxi is exceptional, being lowest on the east side.* 
there is no synchronism in the eruptions of Etna and Vesu- 
vius, so there is no simultaneous activity of Cotopaxi and Pi 
chincha. These voleanoes must have independent reservoirs, 
for Cotopaxi is 3,000 feet higher than Pichincha, and only 
Snow limit, 7, ae 
a 
10,000 ft. Cotopaxi, looking south. 
Snow limit. eee ean a Oe ee 
10,000 ft. Pichincha, looking west. 
that Cotopaxi and Tunguragua, are sympathetic. The vole 
noes of Ecuador, (excepting Sangai,) alate to Serope’s third 
sana, 25 miles ; on the third, Quirotoa, Pichincha and Gu® 
ro Nh mel on the fourth, Langanati, 40 mi 
5 
>a 
3 
‘the seventh, Altar, 65 miles ; on the eighth, Sangai, 75 miles 
7 ninth, Chiles and Assuay, 100 ak. oe 
The chief dome of Chimbo aranda & 
ba ge we ; while from a spot near 7 
amba, the profile of the whole mountain has the figure ° 
* In the voleanoes 
1¢ Mexican craters, are lowest on 
