268 



SOUTH AMEEICA— THE ANDES REGIONS. 



Albemarle and Narborough. In 1735 Admiral Byron saw flames shooting up from 

 a cone in Albemarle, and in 1814 and 1825 other English observers witnessed 

 eruptions in Narborough, where the volcanoes reach the greatest height, and 

 where the red lavas best preserve the appearance of molten metal. All the 

 summits, which vary in altitude from 1,600 to 3,-300 and even 3,700 feet, had 



rig. 104. — Volcanic Geoup of ALBEitAELE Island. 

 Scale 1 : 1,2(X),000. 



9r40' 



West or Greenwich 



IS Miles. 



terminal craters, some obliterated, some still open and pierced with vents, from 

 which were formerly ejected lavas or vapours. Besides these terminal vents, nume- 

 rous openings occur on the lateral cones and even at the foot of the mountains. 

 In the whole archipelago the still plainly visible craters are estimated at over 

 two thousand. 



