THE. NARRABURRA METEORITE. 241 
the photographs may consist of this mineral, but they 
have not yet been isolated and examined chemically. 
Carbon is present, but the amount has not yet been deter- 
mined, antimony, tin, arsenic and chromium were not found. 
Tests for Gold and the Platinum Metals.—Ten gms. of 
the sawdust from slice No. 1 were treated with dilute pure 
hydrochloric acid. A residue weighing °3665 gm. was left. 
After grinding this residue in an agate mortar, it was seen 
to contain a number of bronze coloured metallic looking 
particles, many of which were triangular in outline and 
about °5 to 1 mm. across; they were but feebly magnetic 
and dissolved readily in nitric acid. They appear to be 
erystals which have been flattened in the mortar. 
The residue insoluble in hydrochloric was partly soluble 
in nitric acid, on adding ammonia to the nitric acid solution 
it became blue from the presence of nickel; copper was 
not found in this solution. On grinding the black residue 
leit by the nitric acid, some minute white metallic particles 
which streaked the mortar were detected. As they were 
insoluble in both hydrochloric and nitric acids the probable 
presence of a platinum metal is indicated. 
The hydrochloric acid solution from the above 10 gms. 
was diluted and treated with hydrogen sulphide and a pre- 
cipitate was obtained weighing °0125, this was ignited to 
remove sulphur, and to oxidise copper and similar metals, 
and ground in an agate mortar, when a few specks of a 
white metal insoluble in nitric acid were obtained, and 
therefore presumably a platinum metal. 
Next 10 gms. of the sawdust from slice No. 2 were treated 
in the same way, and a residue weighing °4472 gm. was 
obtained ; after treating this with nitric acid two specks 
of a yellow coloured metal were left, these were twice 
treated with nitric acid and evaporated to dryness without 
dissolving, and are therefore presumably gold. The hydro- 
