118 Hydrate of Copper and Spodumene. 
ever, a difference in the aspect of the two minerals, and the 
results of the above mentioned analyses, prove them to be 
totally distinct.* Nepheline is the only mineral to which 
the subject of this paper is allied in chemical composition, 
but nepheline is much softer, is more fusible, and crystal- 
lizes differently, having for its primitive form a six sided 
prism, while the primitive form of the mineral in question 
is a rhomboidal prism. 
From the preceding experiments, therefore, the sub- 
stance which J have analyzed, must be considered as a new 
species in mineralogy, and I propose for it the name of — 
Sillimanite, in honour of Professor Silliman, of Yale Col- 
ege. 
Art. 1X.—Analysis of a Silicious Hydrate of Copper, 
from New-Jersey, with a notice of the discovery of two lo- 
calities of Spodumene in the United States. By Gronce 
. Bowen. 
fRead before the Academy of Natural Sciences of Philadelphia, March 
2d, 1824, from whose Journal it is copied.] 
1. Of the Ore of Copper. 
This mineral is found at Shee re New-Jersey, in a 
copper mine belonging to Mr. 1. Camaans. It occurs as an 
perp aite on the ferruginous copper ore of that mine, 
*In order to ascertain the true composition of the onthe » an- 
alyzed a specimen of that mineral from Norway, and found my results to 
coincide, as to its constituent parts, with the analyses whieh are She 
quoted in mineralogical books. 
