[ 125 ] 



contain in their crevices aggregations of rock 

 crystal and of plenty of Granite. Of the Jast stone 

 the largest hlock observed was an oblong slab of 

 about 10 feet long, 5 feet broad and 2 feet thick. 

 Ifc was among tliese that a cube of 2 feet of Gra- 

 nite was found, cut through in the middle hy a 

 seam of very compact trachyte, about 8 inches, 

 thick, so that the Granite on each side was entirely 

 separated; still the whole adhered most perfectly 

 and formed one solid block. This streaks cross both 

 stones in the same continuous and uninterrupted 

 line , as it were lines of fracture, that had gaped 

 and closed to again ; as the rock now shows no 

 disposition to break in that direction. 



From Chisusu to the mouth of the Chirempag 

 is about a mile in a straight line , and from this 

 to the Chiserua a little less than \ a mile. 



On passing the Chirempag , all tracé of the 

 Granite was immediately lost, and every attention 

 failed to discover a single bit of it, which led to 

 the supposition, that its course must be down that 

 stream ; as it is nowhere visible on the sides of 

 the Limbung, along which a small road winds and 

 which had previously been examined. 



Continuing up the Chimangeunteung, the vol- 

 canic rocks are found in situ and present a variety 

 of position in their dip andbeds; the river bas in 

 some places worn its way into them to the depth 

 of severai feet ; whilst at others , where the texture 

 is more compact, it is still f breed to cascade 

 over their rugged surfaces. The black schist and 

 white earthy rock, mentioned in the early part 



