Dr. Walter Flight— History of Meteorites. 215 



grains resembling peridot (some several millimetres in diameter) 

 scattered throughout the mass. The grey surface is, however, not 

 of a uniform tint, but presents two irregularly shaped areas, one 

 being grey, the other yellowish-grey. The stone is very friable, and has 

 no action of the magnetic needle. Before the blowpipe it is fusible, 

 becoming black and feebly magnetic. 



Only a small portion, 14*75 per cent., of the meteorite is broken 

 up by acid, that unacted upon amounting to 85 97 per cent. Below 

 are given, in addition to the composition of the constituents separated 

 by acid, the results of an analysis of the minerals constituting 

 the mass of the stone : 







Si0 2 



A1 2 3 



Cr 2 3 



FeO 



CaO 



MgO K 2 OandNa 2 



<. . J 



A. 

 B. 

 C. 



Soluble. 



Insoluble. 



Total. 



38-85 

 52-93 

 51-51 



4-81 

 1-95 

 2-30 



0-39 



0-34 



24-27 

 16-29 

 17-04 



8-21 

 1-92 

 2-31 



23-86 

 26-52 

 26-61 0-80 0- 



= 100-00 



= 100-00 



0-40 = 101-31 



The soluble portion appears to be an iron olivine, mixed 

 probably with a little anorthite ; the insoluble portion consists 

 chiefly of bronzite, or, according to Pisani, probably hypersthene, 

 with the specific gravity of which mineral that of the meteorite 

 more closely accords. The sulphur and the chromium are, it is pre- 

 sumed, present as magnetic pyrites and chromite; no nickel what- 

 ever was detected. 



The yellowish-green grains were very slightly attacked by 

 acid, only 6 per cent, being soluble in that reagent. Their com- 

 position proved to be — 



Silicic acid 51-10 27'3 



Alumina 2-83 1'3 



Iron protoxide 27"70 11-1 K. q 



Magnesia 17-20 3-8 } x * " 



98-83 



These numbers indicate, according to Pisani's view, the presence 

 of a hypersthene rather than a bronzite, a hypersthene richer in 

 iron than that of Farsund, Norway. The ratio of iron oxide to 

 magnesia is the same as that in the bronzites of the Hainholz, 

 Shalka, Borkut and several other meteorites. 



On some grains of this mineral a well-marked cleavage was dis- 

 tinguished along one direction ; in others a disposition to cleave 

 along a second direction was remarked ; on examining such frag- 

 ments in the polarizing microscope, however, one of the optic axes 

 was almost always seen, while the other is invisible. The angle of 

 the optic axes, as measured in oil, was approximately determined, 

 making 2H=104°. The bisectrix is negative ; but whether it was 

 the acute or obtuse bisectrix, was not determined. 



This meteorite is remarkable for containing no metallic iron, and 

 a very large proportion of bronzite or hypersthene. 



Daubree, during an examination of microscopic sections, noted 

 many characters which favour the assumption that the chief consti- 

 tuent of this meteorite is bronzite rather than hypersthene. Such 

 are : the absence of dichroism, the frequent occurrence of the right 



