HANDBOOK OF THE METEORITE COLLECTIONS. 



125 



According to Des Cloizeaux the stone contains small crystals of 

 a carbonate of magnesia and iron corresponding to the formula 

 (Mg Fe) CO3, which is that of the mineral breunnerite. The exact 

 character of the carbonaceous material is still in doubt. Cloez re- 

 garded it as a humus compound. This J. Lawrence Smith was dis- 

 posed to doubt, but thought it more nearly allied to the so-called 

 hydrated carbon obtained by Schutzenbergen and Bourgeois from 

 white cast iron. 



References.— M. Cloez, Compt. Rend., vol. 58, 1864, pp. 986-988, 

 and vol. 59, 1864, p. 37. M. Pisani, Compt. Rend., vol. 59, 1864, 

 p. 132. J. L. Smith, Original Researches in Mineralogy and Chemis- 

 try, 1884, p. 506. 



ORVINIO, UMBRIA, ITALY. No. 308. 



Stone, Co. Fragment weighing 53 grams. Fell about 5.15 on the 

 morning of August 31, 1872. Six stones found, weighing respectively 

 4.75, 92, 432, 622, 1,003, and 1,242.5 gi-ams— a total of 3,396 grams. 

 The stone is remarkable in consisting of rounded pebble-like masses 

 embedded in a dense paste or ground of essentially the same composi- 

 tion, as shown by the analyses given below, column I being that of the 

 pebbles and column II that of the groundmass : 



Censtituents. 



SUica(Si02) 



Alumina (AI2O3). 

 Iron oxide (FeO) 

 Magnesia (MgO) . 



Lime(CaO) 



Soda(Na20) 



Potash (K2O).... 



Sulphur (S) 



Iron(Fe) 



Nickel (Ni) 



Per cent. 



38.01 

 2.22 

 6.55 



24. n 

 2.33 

 1.46 

 •3J 

 1.94 



22.34 

 2.15 



101. 42 



Per cent. 



36. 82 



2.31 



9.41 



21. 69 



2.31 



.96 



.26 



2.04 



22.11 



3.04 



100. 95 



Specific gravity of pebbles 3.675 and of groundmass 3.60. The 

 mineral composition as determined from these analyses by L. Sipocz 

 is as below : 



Constituents. 



Metallic iron . . 

 Metallic nickel 

 Metallic cobalt 

 Iron sulphide . 



Silicate 



Chromite 



Per cent. 

 18.54 

 3.04 

 Trace. 

 5.61 

 77.76 

 Trace. 



104.95 



II. 



Per cent. 

 18.94 

 2.15 

 Trace. 

 5.34 

 74.99 

 Trace. 



101.42 



