ait yong ren a aides Kaa 
4 
Native Crystallized Carbonate of Magnesia. 145 
biting the stalactical, cylindrical, and botryoidal forms, often 
displaying a black polished surface and glistening lustre. 
Ferruginous minerals are abundant on the mountain for seve- 
ralmiles. A granular oxide, called by miners shot-ore,* from. 
its being principally composed of spherical grains of various 
sizes, was often noticed, and appears in some places in exten- 
sive beds : it is easily fused, and affords a large per centage of 
good iron for castings. - A heavy ore, with a smooth surface 
and some lustre, bearing a considerable resemblance to native 
iron; is sometimes seen. Banks of white sand, resembling the 
siliceous particles of the seashore, are noticed on the moun- 
in tops, containing masses of compact, heavy, ferruginous 
sandstone, similar to the rocks of our alluvial seaboard. Large 
beds of water-worn siliceous pebbles, in no way differing from 
those washed by the ocean, are seen on the height of the 
nudge, in which excavations have been made several feet, 
leaving the depth of the mass uncertain. On some of the 
eminences, for a considerable extent, vegetation is entirely 
excluded by an iron-bound soil. Iron ore, imbedded in an 
earth coloured by, and partly composed of, oxide of iron, 
occupies the surface ; and chalcedony and radiated quartz are, 
Sometimes observed on the primitive ridge. Prospects from 
many of these eminences are extensive and diversified, On 
one side, the ocean and a great extent of coast are in view ; 
on the other, a rich landscape of hills and plains, the eye rest- 
Ng on the highland-chain and the mountains bordering Penn- 
*°v Wania ; the harbour, at your feet, presents a busy, ever- 
varying scene, and the city of New-York appears to great 
‘dvantage from this point of observation. 
The district between the mountain and the narrows, the 
thickly Settled and well-cultivated plain bordering Amboy bay, 
a much of the western division of the island, are decidedly 
luvial, Adjacent to Fort Tompkins, detached pieces of cop- 
Per ore have been found. I have observed petrifactions of 
PO shells in rocks excavated in that neighborhood, twenty 
rom the surface, and sixty above the ocean. 
V * Doubtless the pea ore of the Wernerians. Enpsror. 
OL, L.u.No, 2. 19 Ah 
