No. 50.] 
319 
Near the locality is good water power and abundance of fuel. Be- 
sides the eastern ores, as noticed above, in the primary region of Jef- 
ferson county, Alexandria furnishes a few localities of the magnetic ox- 
ide. These localities are limited in extent, furnish a bright, shining 
ore when recently fractured, and have been called, erroneously, specu- 
lar oxide. Those varieties of ore which I have seen,, are similar to 
those which are known in other places as making a hard iron. 
Magnetic Ore of Essex and Warren Counties. 
Before concluding my account of the ores of the Second Geological 
District, 1 would not omit noticing a mineral district in the neighborhood 
of Brant lake, and a vein of valuable ore in Schroon. 
The first locality is on the Ellis tract, in Hague. It is a vein of ore 
about 2 feet wide at the surface, runs north and south, and dips to the 
east. The accompanying rock is hornblende, much stained with the 
oxide of iron. It is highly magnetic, fine granular, free from rock, and 
upon the whole looks like good ore. 
Another collection of ore occurs 3 miles north of Brant lake, in a re- 
gion called Desolate. It is from 8 to 10 rods in length, and about 10 
feet thick. The ore is fine granular, and compact, stained slightly on 
the surface by decomposed pyrites. It appears like a valuable fur- 
nace ore. 
» 
In Schroon, on the land of Mr. Harris, is a vein of magnetic oxide, 
6 or 7 feet wide, and which may be traced a number of rods. It is on 
the west side of Paradox lake. It is a beautiful, coarse grained ore, 
mixed with a very small quantity of flint. It is the purest ore which I 
have yet seen in that particular neighborhood, and is well worthy of at- 
tention. 
Another vein arises on the east side of Paradox ; it is only about 18 
inches wide, and dips too much into the mountain to be explored to 
advantage. 
The Roberts vein, in Warrensburgh on lot No. 80, has been noticed 
in the former reports. It is about 4 feet wide, and increases in width 
as it extends downwards. 
Notwithstanding all that has been said of the ores of iron in the Se- 
cond Geological District, I still consider the accounts to be yet incom- 
plete. I have lost no opportunity for observation on this important sub- 
