344 TRANS. OF THE ACAD. OF SCIENCE. 
from a smooth and gently sloping plain. The portion of these 7 
mountains observed to-day consists of gray and purple por- 
yry, mica-schist, greenstone, compact quartz, and felspar, 
most of which appear to be undergoing rapid disintegration 
being not unfrequently so soft as to crumble readily between 
fingers. The weathered faces are of yellowish, ts 
and purple colors. 
Dee. 12. Beated at 7 o’clock. For the first few Livers. : 
continued to wind through deep and rugged caiions, some of 
which presented. nearly v ertical sides, exhibi and 
5A 
