Br. Walter Flight^On Meteorites. 107 



from Dr. Babesin, and he has recently published a paper on the 

 results of the physical and chemical examination of them.^ 



The crust of the stone has a brownish black colour, and is -J- to J 

 mm. in thickness ; it has the appearance as though it had not been 

 subjected to so intense a heat as that usually developed during the 

 fall of a meteorite. The finely-grained light grey matrix encloses 

 granules of magnetic pyrites (troilite?), granules and plates of 

 nickel-iron, and numerous dark grey crystalline spherules, averaging 

 •J mm. in diameter; one little sphere had a breadth of 3^ mm. 

 They have an excentric-radiate or contorted-radiate structure. A 

 freshly broken surface of the stone is studded with these chondra, 

 and they are easily removed from the matrix. As regards their 

 mineralogical aspects, the spherules are found to be of two kinds. 

 One consists of small prisms of a rhombic mineral, which has all the 

 appearance of a variety of enstatite ; others are found to possess all 

 the properties of olivine. These two minerals also constitute the 

 greater portion of the matrix. The augitic mineral occasionally 

 contains opaque granules and colourless microlites, the olivine pores 

 or cavities, some of which, the author states, appear to contain fluid. 

 Metallic particles are rarely, if ever, found in the spherules them- 

 selves. An accessory mineral, transparent, pure, and with well- 

 defined edges, is also to be found in the meteorite. It differs from 

 the rhombic augite in exhibiting no cleavage fissures, from olivine 

 by the smoothness of its polished exterior, and from both of them by 

 exhibiting distinct pleochroism with absorption ; one tone being 

 colourless, the other pale red with a faint tinge of brown. It appears 

 to be rhombic, and shows a close resemblance to a variety of 

 hypersthene found by Cohen in a gabbro from South Africa. The 

 Zsadany stone resembles those which fell on several different 

 occasions at Lance, Gopalpur, and Pultusk. 



By treatment with acid a considerable quantity of the silicate was 

 decomposed. The analysis of the portions thus separated gave the 

 following numbers : — 



Soluble Portion. Insoluble Portion. 

 Silicic acid 44-56 56-71 



Alumiaa trace 



Iron oxide 17-54 



Lime trace 



Magnesia 37'90 



2-32 

 13-21 



1-77 

 25-99 



100-00 100-00 



The stone, therefore, appears to consist to the extent of three- 

 fourths of a bronzite, the remaining fourth being an olivine, in which 

 the equivalents of MgO : FeO are as 3-89 : 1, or approximately that 

 which is often met with in meteoric olivines. 



1875, April 14th, 030 a.m.— Haddon, Grenville Co., Victoria, 

 Australia.^ 

 A very brilliant meteor appeared from a bank of cloud about 20° 



^ E. Cohen, Verlumdl. Naturhis. Med. Vereins zu Eeidelherg, 1878, II. Heft 2. 

 2 The Illustrated Australian News, May 17, 1875, p. 68. 



