280 TRANS. OF THE ACAD. OF SCIENCE. 
east and southwest. From one point of observation, there is 
a gradual descent to the northeast, while, tothe; cath 
rough and Thee 
slope is rapid towards the plains, and marked sa 2 
ru cafions, often with ne vertical. 
the 
spin walls of such extreme oes ty that their 
ar enveloped in clouds. It is only when 
h undred feet above the base. ‘The pei faoes.of 
a . the axis of t h 
