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Cxi- XXIIL] 



OF VOLCANIC EEGIONS. 



587 



terruptions, throughout a space of between sixty and seventy 



degrees 



Moluccas 



branch to the south-east, while the principal train continues 

 westerly through Sumbawa and Java to Sumatra, and then 

 in a north-westerly direction to the Bay of Bengal.* This 



may 



volcanic line, observes Von Buch, 

 throughout its course the external border of the continent of 

 Asia • while the branch which has been alluded to as striking 

 south-east from the Moluccas, passes from New Guinea to 

 New Zealand, conforming, though somewhat rudely, to the 



t 



New 



the line in Java (as laid down in Von Buch's map) is not 

 clearly made out. 



t 



5 



with equal propriety include the Mariana and Bonin volcanos 



New 



Or if we allow so much latitude 



ve must also suppose 

 New Ireland to con- 



map 

 extremity 



summit 



described by Von Buch, is on the borders of Cook's Inle 

 north-east of the Peninsula of Alaska, where one volcano, in 

 about the sixtieth degree of latitude, is said to be 14,000 feet 

 high. In Alaska itself are cones of vast height, which have 

 been seen in eruption, and which are covered for two thirds 

 of their height downwards with perpetual snow. The 

 of the loftiest peak is truncated, and is said to have fallen 

 in during an eruption in 1786. From Alaska the line is con- 

 tinued through the Aleutian or Fox Islands to Kamtschatka. 

 In the Aleutian Archipelago eruptions are frequent, and about 

 thirty miles to the north of Unalaska, near the Isle of Um- 



in 1 796. It was first observed 

 e sea from which a column of 



formed 



smoke had been seen to rise. Flames 



* See map of volcanic lines in Von 

 Buch's -work on the Canaries, 

 t Von Buch, ibid. 409. 

 \ Darwin, Structure and Distrib. of 



Coral Keefs, &e. London, 1842. In the 

 annexed map, fig. 59, I have copied 

 with permission a small part of the valu- 

 able map accompanying this work. 



