MINERALOGY. 27 
ery of localities. It is best recognized by heating a bit in an open glass 
tube, when it will be seen to fuse without difficulty, and to emit white 
fumes, which condense as an amorphous sublimate, while fumes of sul- 
phurous acid emerge from the end of the tube, recognizable by their 
reaction on litmus paper, and by their smell. 
g. MotyBvENITE [Mo, 8,]. 
This mineral, though not elsewhere common, has been found in abun- 
dance in this state. At Westmoreland there is a large vein of the massive 
mineral occurring in the crystalline rock, from which large amounts have 
been taken, and which has furnished specimens for every mineral cabinet 
in the country. At Landaff and Franconia it is often found in beautiful 
tabular hexagonal crystals, but ordinarily it is in a more massive condition. 
Fine crystals are found at Whitefield, Lyme, New London, and Alstead. 
Other localities are Orford, Newport, Warren, Jackson, Effingham, and 
Grafton. 
This mineral, when first found, was by some confounded with graphite, 
and, as graphite, the attempt was made to utilize it; but the crucibles 
that were made of it fell to pieces in the process of baking. Its lustre 
and streak are somewhat different from graphite, but it is easiest recog- 
nized by the green flame that it imparts to the blow-pipe flame. Molyb- 
dic acid is sometimes found associated with it as a decomposition product. 
This acid, which is a very valuable chemical reagent, is made by roasting 
molybdenite. 
ro. ARGENTITE [Agg, S]. 
A silver mineral once found at Cornish by Jackson was suspected to 
be argentite, but it was not proved. As silver sulphide exists in our 
galenas, it may possibly be found. 
11. GALENITE [Pb, S]. 
Galena is a very common mineral in New Hampshire. It occurs in 
small beds and veins, and though it has never been found in such large 
quantities as to make it a profitable lead ore, yet the uniform presence in 
it of varying amounts of silver has always made it a mineral of great 
interest, and numerous attempts have been made to mine it. It is well to 
