VICTORIAN METEORITES, WITH NOTES ON OBSIDIANITES. 
Analyses : — 
I. 
II. 
Iron 
.. 57-49 
.. 58-07 
Nickel 
.. 4-30 
.. 4-34 
Cobalt 
.. 1-50 
.. 1-52 
Sulphur 
.. 35-71 
.. 36-07 
Phosphorus 
Trace 
— 
Chlorine 
. . Trace 
— 
Graphite 
.. 0-33 
99-33 
.. 100-00 
Amount used .. 0-3327 
No. II. is calculated to 100 after deducting graphite. 
After selecting and treating the troilite by hydrofluoric acid to 
remove the film of oxide of iron, the specific gravity was calculated 
as 4 . 7379. 
.1 lie nodules of compact, blackish, ferric oxide derived from the 
decomposition of troilite are referred to stilpnosiderite, the features 
of which appear to be the presence of phosphoric acid and silica, the 
latter occurring in form of quartz splinters (11, p. 1048). As in 
the case of the nickel-iron, chloride of iron undoubtedly helps to bring 
about and augment the decomposition of troilite. An analysis of 
the substance gave — - 
Ferric oxide 
Nickel oxide } 
Cobalt oxide \ 
Ph osph oric pen toxide 
Sulphuric anhydride . . 
Chlorine 
Loss on heating 
Residue 
82-77 
1-68 
0-48 
0-58 
0- 33 
13-41 
1- 52 
100-77 
Schreibersite. This mineral occurs, as in the case of the Cran- 
bourne No. 2 and as noted later in the Langwarrin also, as an 
irregular envelope surrounding troilite patches or nodules neither 
penetrating nor mixing with them. This mode of occurrence is not 
mentioned by Flight in his description of the Cranbourne No 1 
( ohcn also observed the mineral in irregular stout crystals, with 
rounded edges and strongly-grooved surfaces, measuring up to 4 
mm. in length ; and in a lew instances, in plate-shaped pieces partly 
with even and partly with grooved surfaces. In' consequence S 
then great brittleness they all broke up very easily. He gives the 
I’s'Zr WT “ d S " VCT - W,lite ' and * 
£ 34 ] 
