110 
[Assembly 
The details of my analysis I shall shortly present elsewhere. The 
following are the results : 
Silica, 30.50 
Alumina, 11. 25 
Protoxide of iron, 22.27 
Protoxide of cerium, 24 . 90 
Lime, 9.87* 
Cacoxene or Cacoxenite. 
This mineral, heretofore found only in the iron mines at Hrbeck, in 
Bohemia, was obtained during the last summer in an iron mine in the 
town of Antwerp, Jefferson county, where it was first noticed by Mr. 
Vanuxem. 
It occurs in minute radiated tufts on the surface of the compact spe- 
cular iron, or rather in seams in the ore. The crystals or blades are 
arranged in diverging groups, radiating from a centre. Colour, when 
fresh, yellow ; but the surface becomes brown and somewhat pulveru- 
lent on exposure. The lustre of the blades is silky, or approaching to 
metallic, soft and sectile. Infusible by the blowpipe, but when acted 
on by it, it becomes of a brownish colour, and is then attracted by the 
magnet. With borax it fuses into a dark coloured glass. 
Karpholitc, the mineral which this most resembles, is fusible and 
does not become magnetic. 
Cacoxenite is essentially composed of phosphoric acid and peroxide 
of iron. The name which it bears has been given to it in consequence 
of its presence being injurious to the iron ore. 
Tabular Spar. 
The specimens of this mineral, from a new locality in Diana, Lewis 
county, were apparently so pure, that I was induced to examine one of 
them with great care. It has a snow-white colour, foliated structure, 
and a high vitreous lustre. It is semi-transparent, and closely resem- 
bles some varieties of tremolite. Specific gravity, 2.937, which is a 
little higher than that of specimens from other localities. The follow- 
ing are the results of my analysis, in 100 parts, viz. 
Silica, - 51.90 
Lime 47.55 
Oxide of iron, 0.25 
This approaches very nearly to its true atomic construction. The mi- 
neral at the above locality is associated with green coccolite, but pure 
specimens of considerable size may be obtained. 
Stellite. 
This is the name given by Dr. Thomson to a mineral found in the 
rifts of a greenstone rock situated on the banks of the Forth and Clyde 
canal, in Scotland.! I have found specimens which agree in the most 
* This approaches very nearly to the composition of the ceriie of Hisinger and Ber- 
zelius, found at Bastnaes, near Riddarhytta, in Sweden, This, however, is now gene- 
rally supposed to be identical with the allanite from Greenland. {See Beudant, Phi- 
lips and Shepard.) Dr. Thomson's cerite is entirely distinct from the preceding. 
t Outlines of Mineralogy, Geology, &c. I. 313. 
