aC Essay, Ge. 
from North to South, they terminate precipitous- 
ly at the Ocean, and contain numerous perpen- 
dicular caverns. Having crossed the river of 
Chiching-goleng, the traveller meets at once the 
substance which forms the principal basis of 
these nee, it is an aggregate rock, in its na- 
ture approaching most to that kind which is de- 
nominated by DeSassure Poudingue— Pud- 
digne -- com of fragments of various 
sizes, from very minute particles or grains of 
sand, to such as have six or more inches in diame- 
ter. ^T hey adhere very closely, but without any 
intervening cemen. in which they differ from 
che Amygdaloids of Werner, or from Porphyry 
to which, in other respects, they have great affi- 
ity. The constitution of this rock, one of the 
most common substances which forms the basis 
-of the Island, is greatly diversified, and the 
following remarks apply only to the rock 
which composes this peninsula. Ic is found in 
some parts of the Island of a degree of compact- 
ness sufficient to enable it to take a polish and. 
exhibits in other parts all the varieties of Vol- 
canic or of Basaltie Tufa. 
In the se ot panicles composing the ag- 
-gregate ro | es of Karang-boll 
many of the Sari eties of Vc > stone wh 
are found on the Island, can be discoverd. 
Them most tuniversal is ka e gk EF Wes c 
