328 Mineralogy of Orange County, Ni. 
lite, but it is easy to detect in it the peculiar crystallization of Horn- 
blende, the form of the crystal being that of the Mount Eve variety 
- of the same mineral, except that the angles of the crystals are more 
rounded. Its color is a bottle-green, and it resembles in every re- 
spect the same variety of Hornblende, from Pargas in Finland. The 
Idocrase is for the most part massive ; the individuals presenting a 
granular or columnar structure. Its color is a yellowish green. 4He 
granular variety is undoubtedly the substance described and analyzed 
by Dr. Thomson, under the new denomination of Xanthite, an ac- 
count of which is contained in the Annals of the Lyceum of Natural 
History of New York. Although, as respects its hardness, it does 
not agree’ with that description, the words of which are, “ easily 
crushed to powder by the nail of the finger. It is therefore soft: it 
does not scratch calcareous spar.” It consisted of 
Silica, - - ~ - 32.708 
Lime, - - = - 986.308 
Alumine, - - - ees 
Per ox. Iron, - - - - 12.000 
Protox. Manganese, - “ 3.680 
Water, - - ci a .600 
97.576 
Of late, some distinct, nearly transparent crystals, from one fourth 
of an inch to more than one inch in length, have been found at this 
spot, having their lateral and terminal edges truncated. Associated 
with them, occur small grains of dark green Pargasite, and white, mas 
sive Scapolite. Just above this trench, a digging has been made, als 
from whence handsome crystals of Zircon have been obtained. 
likewise affords a reddish Garnet, Sphene and Phosphate of Tame. 
But these last mentioned substances are not found plentifully, °° m 
valuable specimens with the exception of the Zircon, which, thous 
rare, is in large and highly colored crystals. 
The next place to be described is one which has afforded _ 
specimens of Black Spinel that have excited, by their extraordinary 
dimensions and perfection of form, the astonishment of the W 1a 
mineralogical world. It is situated in the road contiguous wt 
farm of J. Layton, one mile southwest of Amity meeting house, and 
is marked No. 2 upon our map. We owe its discovery ' ym 
Fowler, of Franklin, who observed, about nine years 280 the first 
specimens lying loose in, or near, the cart-path. His observation ledio 
