VICTORIAN METEORITES, WITH NOTES ON OBSIDIANITES. 
been freed from the mass of the meteorite by the decomposing 
action of the chloride. This would seem to indicate that that 
coriosive constituent is either chiefly associated with the nodules, 
or that it is freer to move and exert more influence along the contact 
of the latter with the nickel-iron than elsewhere. 
Graphite.— -This mineral has already been mentioned in associa 
tion with the troilite. It usually forms a regular envelope to the 
latter, and is, itself, surrounded by schreibersite. In one instance, 
it was mixed with the troilite, and in another it formed the nucleus. 
Some of the graphite nodules appear to be largely impregnated 
with troilite, and associated with another sulphide referred to under 
the next heading. 
Undetermined Sulphide, Hydrocarbon and Sulphur. — On 
breaking up the piece of nodule, referred to under lawrencite 
which came out of the partly disintegrated material, a small patch 
of bright, black mineral was exposed within the graphite, and just on 
its boundary with the troilite. The graphite in this instance formed 
the nucleus of the nodule. The patch was without regular form, and 
showed a strong cleavage to which the lustrous face observed was due. 
The mineral was non-magnetic, fragile, and easily scratched, yielding 
apparently a sliming streak. The last-mentioned character was not 
established positively, for the face being so small it is quite possible 
that the graphite was really responsible for the streak. A fragment 
of the nodule, after treatment with dilute hydrochloric acid to 
remove the troilite, broke up into a black powder, which, on 
examination under the microscope, was seen to consist for the most 
part of dull-black, carbonaceous-looking grains of irregular form 
Besides these, there were some small cleavage flakes of the nnneral 
in question, several of which were of regular outline, giving the 
impression that they had been produced by two other cleavage planes 
in conjunction with the one already referred to. The physical 
characters of the mineral and its mode of occurrence resembled so 
closely those given for daubreelite, that the identity of the two 
minerals seemed almost certain, and tests were accordingly made for 
chromium. Particles in the borax bead were not wholly absoibed 
after prolonged heating. The bead at first became dark, but cleared 
subsequently to a yellow colour, and was almost colourless when cold. 
Particles were not affected by dilute hydrochloric acid, although 
some slight action appeared to take place on treatment with jo 
stiorm acid They readily decomposed on being treated with 
strong nitric acid, with the separation of sulphur. The solution 
was coloured pale yellow. According to J. Lawrence Smith 
who described daubMelite, the smallest particles of that 
mineral imparted a strong green colour to the borax bead. n 
IV n tn this he mentions that complete solution was effected 
“nitric add "it liberation of Le sulphur, and that the 
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