146 Scientific Intelligence. 
valleys, and on the morning of the last day, after an interview 
with an armed party of Indians (it was only a few days before 
the disastrous expedition of Major Thornburgh, and the surround- 
ing tribes were said to be already in a ferment), we emerged from 
the mountains upon the great sea of black lava which seems to 
_more stupendous series of voleanic phenomena has yet 
been discovered in any part of the globe than those of north- 
pe 
the Faroe Islands and Iceland, was rent by innumerable fissures 
in a prevalent east-and-west or southeast-and-northwest direction. 
These fissures, whether due to sudden shocks or slow disruption, 
The paper gives further details respecting these British ejections, 
and alludes also to the great basaltic plateaux of Ab ssinia and ra 
