96 llev. Dr Eleming'’s Glemimgs (^Natural History, 
mica-slate, granite, and blue and white quartz. At the point, 
however, at which the light-house is situate, and which still re- 
tains its Norwegian appellation Klihberness, that is. Soapstone 
Promontory, several minerals occur, associated with a nearly 
vertical bed of common serpentine. 
The Serpentine is of a uniformly dark-gfeen hue. Its weath- 
ered surface is nearly even, and of a brownish colour. Its re- 
lation to the gneiss, on its west side, is not well displayed ; but, 
on its opposite side, it unites therewith by a series of irregular 
beds, in which Chlorite may be considered as the prevailing in- 
gredient. This substance, in some places, is in the form of 
nearly unmixed chlorite-slate ; while, in others, its appearance is 
much altered by the quantity of black mica and large imperfect 
crystals of Hornblende which it contains. In one place there is 
a thick mass of that singular variety of hornblende rock described 
by Professor Jameson in his Mineralogy of the Scottish Isles,” 
Vol II. p. 15., as occurring in Iona. It consists of a green 
coloured, hard, compact felspar, with numerous crystalline 
grains of hornblende In a vein in this rock, I observed small 
translucent greyish-coloured crystals of Augite^ along with quartz 
and calcareous spar. 
In the Serpentine, the following minerals were observed : — ■ 
1. Potstone. This forms a thick mass, occasionally much mixed 
with small crystals of magnetic iron-ore^ and Actynolite. % 
Translucent Steatite^ in small veins. 3. Asbestus,, in short ir- 
regular veins, from a tenth of an inch to upwards of one inch 
in thickness. 4. Common Dolomite,, in the form of a short co- 
temporaneous vein. 5. Magnetic Iron-ore abounds in all the 
minerals with which the Serpentine is connected ; and, in that 
rock itself, it occurs disseminated in such quantity as to alter 
considerably its fracture and weight. In one place, I observed 
it collected into a short contemporaneous vein, much mixed with 
asbestus, and so greatly acted upon by the crystalline force of 
that mineral, as to exhibit an imperfectly fibrous structure. 
When on the eve of our departure from this island, we got on 
* The characters of this rock, and indeed of many of the less distinct combina- 
tions of hornblende and felspar, are rendered more obvious by heating a portion to 
redness. The different ingredients become perceptible by a difference in colour, 
lustre, and structure, 
