VICTORIAN METEORITES, WITH NOTES ON OBSIDIANITES. 
In another, again, about 4| cm. by cm., the core is formed of 
graphite, which is almost completely surrounded by troilite. 
Schreibersite, in small quantity, is very irregularly distributed as 
an external layer. 
Finally, one nodule does not appear to be associated with graphite 
at all. 
The section cut from the point of the meteorite for etching and 
examination has not cut through a single piece of troilite, and if 
this were the only exposed part of the meteorite, very erroneous con- 
clusions might be drawn as to the presence and mode of occurrence 
of the mineral constituents. 
Analyses : — 
I. 
11. 
Iron 
.. 61-07 
62-14 
Nickel 
.. 1-02 
0-18 
Cobalt 
.. 0-24 
0-09 
Copper 
.. 0-05 
Trace 
Phosphorus 
.. 0-20 
0-01 
Sulphur 
.. 32-76 
34-37 
Chromium 
Trace 
Trace 
Carbon 
• • 
0-53 
Water + (combustion) 
— 
0-94 
Water - (105°C.) . . 
— 
0-26 
Residue 
.. 0-17 
0-38 
95 ; 51 
98-90 
Amount used 
. . ~ 1-40 
. . F60 
Analysis No. I. was made from part of a small nodule consisting 
of troilite and graphite, and No. II. from a portion of the thick vein 
described above, exposed on the polished face. fbe amount of 
material made available for No. II. analysis permitted Bayly to 
make a fuller examination than was possible in the case of 
No. I. The hygroscopic moisture (0-26 per cent.) was determined 
at 105°C., and then a further portion of material was heated in a 
combustion tube with lead chromate, and the total water evolved 
weighed in a calcium chloride tube. This amount being in excess 
of the hygroscopic water indicated either the presence of combined 
water, which is unlikely, or possibly, as suggested by the inclusion 
of carbon, of a hydrocarbon, forming water on combustion. 
DaubrEelii e.— From the detection of chromium in the troilite 
analyses the presence of daubreelite may be assumed. Apparently 
it is the mineral which forms extremely fine veins traversing the 
thick vein of troilite. 
SCHREIBERSITE.-The presence of schreibersite in connexion with 
the troilite nodules has just been noted; apart from this it is found in 
the residuea after solution of the nickel-iron. No plates of it, such 
L 39 ] 
