154 Lieut. Baddeley on the scognosy 
pearance. Being questioned as to its abundance more particu- 
larly, he said that it occurs in veins from six inches to two feet 
wide and in rounded blotches from six to eight feet thick- 
The highest mountain in that part of the chain where we 
were, commands a most “beautiful and extensive view of the 
surrounding country. 
We will now give the mineralogical characters of that depo- 
site of ore which we first met with at St. Urbain; after doing 
which, only a few further remarks on the others will be neces- 
sary, as they differ from each other principally by being more 
or less mixed with impurities. They are almost all of them 
remarkable for the want of the magnetic character, although 
possessing the metallic blackness, structure, and other points 
of agreement with the magnetic oxide of iron to which species 
they undoubtedly belong. 
MINERALOGICAL CHARACTERS OF SPECIMENS. 
Nos. 1 to 4.—Colour, iron black, but break into fragments, the 
surfaces of which are much tarnished by rust; no par- 
ticular structure could be ebserved ; some parts were 
indistinctly laminated, but the general mass appears to 
be compact granular, The fraeture when not effected 
in the direction of a rusty seam is uneven. They can- 
not be scratched by the knife, but are easily broken, 
and do not give fire under the hammer ; their powder 
is quite black ; specific gravity about 4. 5. Some por- 
tion of the ore from this deposit had a vitrified and. po- 
rous aspect on the surface like cast iron. They are 
not magnetic before the application of. heat. Before 
the blow-pipe they do not alter in any other respect 
than by becoming magnetic. With borax they fuse into 
a 
