46 
[Assembly 
No* 1. — A specimen of magnetic iron ore which I received as from 
Fort- Ann, in Washington county. The precise locality I am not ac- 
quainted with. 
No. 2. Magnetic iron ore from the O'Neil mine, Orange county. Com- 
pact, of an iron black colour, is attracted by the magnet, and possesses 
polarity. In the seams of this ore, small, but very brilliant, octahedral 
crystals are found. Cubic crystals of the same ore have also been found 
here, but they are of very rare occurrence. 
No. 3. — From the Rich iron mine, Monroe, Orange county. The 
specimen is remarkable for the ease with which it cleaves in the direc- 
tion of the primary octahedron. The cleavages have a high metallic 
lustre. Colour, iron black; powerful action on the magnet. The sili- 
ca is undoubtedly foreign. 
No. 4. — This ore is cellular, apparently having contained sulphuret 
of iron, which has been dissolved out. It looks like a decomposed ore, 
although it is not only attracted by the magnet, but possesses polarity. 
It sometimes contains thin seams of asbestus. It is from the Forshee 
mine, in Monroe, Orange county — a most interesting deposit of iron 
ores. 
No. 5. — From the Wilk's or Clove mine, Monroe, Orange county. 
It consists of grains of magnetic ore, of various sizes, closely united j 
w^ith grains of iron pyrites intermixed. The ore is attracted by the 
magnet, but does not possess polarity, or only feebly. The specimen 
analyzed was as free as possible from pyrites. The ore requires roast- 
ing before it is used by the smelter. 
No. 6. — Specular iron ore from the town of Hermon, St. Lawrence 
county. Made up of black shining scales, resembling graphite. Mag- 
netic action very feeble, or none. Powder, red or purple. This speci- 
men is very pure, — ^but the ore sometimes contains an admixture of sul- 
phate of barytes, and occasionally of phosphate of lime. It is now 
worked without difficulty. 
No. 7. — Limonite or brown hematite, from Dungin's mine, in Rich- 
mond county. Small rounded masses united together by a ferruginous 
cement, constituting what is commonly called shot ore. Powder, brown. 
No. 8. — A specimen from a stratum of brown earthy hydrate of iron, 
known by the name of umber; — associated with magnetic iron ore, at 
the Forshee mine in Orange county. There are several different varie- 
ties of iron ore at this locality. 
