VICTORIAN METEORITES, WITH NOTES ON OBSIDIANITES. 
notably from most of those seen in the section of the Cranbourne 
No. 2, but at places this regularity was not maintained, and then 
the structure of the two meteorites bore a much greater resemblance. 
The plessite and taenite occur in the same manner as in that 
meteorite, but, if anything, the latter is less conspicuous and does 
not form the continuous lines observed in the Cranbourne No. 2. 
The taenite lamellae likewise showed prismatic crystals of (?)rhabdite, 
and angular metallic particles of (?) schreibersite, and the lamellae 
were so similar when examined under the microscope that it 
was not possible to say, without knowing it, from which meteorite 
they came. They were extremely thin, and it was scarcely 
possible to collect a sufficient quantity from the dilute hydrochloric 
acid residue to enable an analysis to be made. No taenite could 
be found in the crust. 
Analysis oj taenite : 
Iron 
Nickel 
Cobalt 
Copper 
Phosphorus 
Residue 
. 51-46 
. 38-97 
. 0-45 
. 0-41 
. 1-05 
very small 
92-34 
Amount used . . 0-0581 
In the above analysis the material was obtained entirely by 
chemical means (solution of the nickel-iron in dilute hydrochloric 
acid). The same difficulty was observed in the analysis as is 
discussed under the Cranbourne No. 2 taenite ( q . v .), and 
indicated by the low summation. 
Troilite. The thick vein of troihte exposed m the polished 
face of the meteorite measures about 17 cm. in length by from 
1 1 cm. to 2 cm. in breadth. It is slightly curved, with angular ends 
and a short branch is given off from the convex side. 
The troilite has a brecciated appearance, produced by the 
presence of angular patches in a lighter ground, as though' incipient 
decomposition were taking place. The nodule is surrounded by the 
usual layer of graphite, in this instance a very thin one, and this 
again by a fairly uniform envelope of schreibersite, attaining a 
maximum thickness of 1% mm. Decomposition has proceeded in 
the nickel-iron along the outside of the schreibersite envelope 
resulting in the formation of a thin shell of ferric oxide. ’ 
On three other nodules the presence of ferric oxide prevents an 
accurate idea of the arrangement of the minerals behm obtained 
[ 38 ] 
