VICTORIAN METEORITES, WITH NOTES ON OBSIDIANITES. 
all the cohenite^ was decomposed, and the carbon liberated was 
then washed off and determined by combustion. The amount 
of phosphorus present (4-‘ 75 per cent.) clearly points to the impurity 
of the powder used in the analysis. The amount, however, is too 
large to be regarded as wholly derived from schreibersite, on account 
of the insufficiency of the nickel contents. 
Lawrencite. — This ingredient is very abundant in the Lang- 
warrin meteorite. Since the specimen has been in the Museum, 
that is from 1886, or over 26 years, it lias been constantly exuding 
chloride of iron from all parts of its surface, which has resulted in 
a serious loss by scaling. The scaling has been checked to a great 
extent by coating with shellac and using driers in the case. The 
large chiselled face rusts within a very short time of being cleaned, 
owing to the sweating out of the chloride all over its surface, and on 
the face of the section cut off for examination the chloride of iron 
accumulates in drops along the junction of the nickel-iron and 
taenite lamellae. On the contrary, the artificial face on the Cran- 
bourne No. 2 remains fairly bright continuously, although exhibited 
in the open and unprotected from fingering by visitors. 
There is no doubt that the disintegration of these meteorites is 
brought about by the physical and chemical action of the chloride 
of iron exerted between the plates of nickel-iron. Atmospheric 
agencies alone on the other siderites in the Museum appear only 
to have produced a uniform oxidation of the surface, resulting in 
the production of a coating or thin crust of ferric oxide without 
any sign whatever of disintegration. This fact is well illustrated 
by the total absence of disintegration on the “ thumb-marked ” 
part of the surface of the Cranbourne No. 2 where no exudation of 
iron chloride lias taken place, whilst elsewhere, although in a slight 
degree only, traces of chloride of iron are to be found, as well as 
evidence of scaling. 
Graphite. — Graphite forms a thin envelope to most of the 
troilite nodules, and in one rather large oval nodule it takes the 
place usually occupied by the troilite, and is itself surrounded by 
the latter. The variation in its mode of occurrence in connexion 
with these nodules is quite similar to that observed in the Cran- 
bourne No. 2. 
Undetermined Sulphide, Hydrocarbon, Sulphur, and Dau- 
brRelite . — In dealing with a hydrocarbon and sulphur from the 
Cranbourne No. 2 meteorite, in conjunction with Bayly, it was 
mentioned that the quantity of material was not sufficient to 
enable the tests to be completed, and a similar substance from 
the Langwarrin meteorite was utilized. The Langwarrm 
material was part of the residue obtained from a considerable 
quantity of powdered oxidized crust, by prolonged treatment with 
hydrochloric acid. The residue thus obtained was non-magnetic, 
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