SCIENTIFIC SUMMARY. 
279 
line particles in the centre are also supposed to he olivine. Troilite exists 
in small quantity. A quantity of the silicates was picked over, separated 
as far as possible from iron, and treated with hydrochloric acid. The ratio of 
soluble to insoluble silicate varies very much in different parts of the 
meteorite, varying from 16 to 60 per cent for the soluble part. 
The insoluble 
part consisted of 
Oxygen 
Silicic acid 
54-12 
29-12 
Iron protoxide .... 
21-05 
4-67 
Chromium oxide .... 
. trace.. 
Magnesia 
24-50 
9-80 
Soda with traces of K and Li ., 
•09 
•023 
Alumina ..... 
•03 
•013 
99-29 
This is evidently the bronzite commonly found in meteorites. 
The green mineral is the soluble part of the meteorite ; its cleavage in one 
direction is very perfect, its specific gravity 
is 3*35,, it has 
a hardness of 
almost 7, and is readily and completely decomposed by hydrochloric acid. On 
analysis it was found to have the composition 
Oxygen 
Silicic acid . .. 
41-50 
22-13 
Iron protoxide 
14-21 
3-12 
Magnesia 
44-64 
17-86 
100-35 
This mineral, therefore,, is olivine. Dr. Lawrence Smith, who has 
examined this meteorite, describes a third silicate which is opalescent and of 
a light greenish-yellow colour, and cleaves readily. It was a difficult matter 
to obtain enough of this silicate for analysis, but an examination of 100 milli- 
grammes gave the following numbers : 
Silicic acid . 49-60 26-12 
Iron protoxide 15-7& 3-50 
Magnesia .. 33-01 13-21 
9S"39 
This is equivalent to one atom of bronzite and one atom of olivine, which, 
he says, is ‘ A form of silicate that we might expect to find in meteorites.’ 
The nickel iron, as has already been stated, is abimdant, sometimes in large 
nodules of from 50 to 100 grammes. It displays the Widmanstattian figures 
beautifully, and possesses the following composition : 
Iron 
92-001 
Nickel ...... 
7-100 
Cobalt ...... 
0-690 
Copper 
Minute quantity 
Phosphorus 
0-112 
99-903 
