ISLAND OF NAXOS. 113 
d to us by the Chancellor, but 
we were not told what use they made of it. 
was mentioned to us by the Chancellor, but CHAP 
as the eastern shore of the island, and forms its central ridge, as well 
as the whole of its interior. 
This rock is a compound mass of mica and feldspar, of a fine folia- 
ceous grain, corresponding' with that which I found near Marathon. 
It divides into large slabs : small veins of feldspar frequently occurred 
in the transverse fissures of the rock; and the feldspar sometimes con- 
tained the Amphibole Actinote aciculaire of Hauy and Brogniart. 
" I observed that the strata on the west of the Vale of Trimalia dipped 
regularly in an angle of 40 to the w. and by N. and N. w. by the com- 
pass ; and that, near the village of Potamia, they alternated with beds 
of the large-grained white primary marble, which varied in thickness, 
from six to ten feet. Advancing eastward, the mountain which divides 
Potamia from the Vale of Trimalia presents the same rock entire ; 
but here the lamina? were of a waving form, and the rock was not in- 
tersected by fissures. On the eastern side, however, of the same 
mountain, as I descended into the Vale of Trimalia, I observed that 
the strata re-assumed their straight slaty texture ; hut here they dipped 
in a contrary direction, i.e. to the east, under the same angle. 
" Soon after this, recommenced alternate beds of the same primitive 
marble as 1 observed before, which now became more frequent, and 
continued through the whole tract over which I passed, as far as the 
eastern coast of the island ; presenting, eastward of the mountain of 
Jia, and the village of Aperathi, a greater breadth even than the beds 
of the micaceous rock ; the average thickness of these beds amounting 
to 40 or 50 feet, and occurring sometimes of 100. The grain of the 
marble was here finer ; and although the strata preserved the same 
degree of inclination to the horizon, yet their line of bearing was 
somewhat different, their dip being here E. and by N. 
"Fragments of emery occurred plentifully in the Vale of Trimalia ; 
and I observed black horn- slate, in thin beds, in the micaceous strata 
west of Aperathi. Near x|jc/, in the Vale of Trimalia, I found rose- 
coloured quartz. 
" The best emery is found at Triangatho, a deep narrow vale, one 
hour and a half distant, east, from Aperathi ; and one hour from the 
sea-shore. 
VOL. VI. I " To 
