124 BULLETIN 94, UNITED STATES NATIONAL MUSEUM. 



ORGUEIL, MONTAUBAN, TARN-ET-GARONNE, FRANCE. Nos. 234, 388. 



Stone, K. Weights. 61 and 08 grams. Fragment with crust and 

 nearly complete individual. Fell on the evening of May 14, 1864, a 

 few minutes after 8 o'clock, the fall being accompanied by the usual 

 phenomena. Over 20 stones fell, weighing in the aggregate some 

 11,523 grams. 



This is one of the most interesting of carbonaceous meteorites, but 

 perfectly satisfactory analyses are lacking. The stone is described 

 as a black, porous, friable mass, falling to pieces in water. Cloez 

 found it to contain 21.33 per cent water and organic matter. The 

 mineral composition as calculated from his analysis would be, ex- 

 clusive of the organic matter: Nickel-iron, 17.58; pyrrhotite, 11.62; 

 chromite 0.35; and mixed silicates, 41.91. In detail his results are 

 as follows on material dried at 110° C, the loss under this treat- 

 ment being 5.975 : Per cent. 



Silica (SiOj) 26.031 



Sulphuric acid (SO,) 2.3345 



Sulphur (S) 4.6466 



Chlorine (CI) .0776 



Phosphorus (P)_^ Traces. 



Aluinlua (AUOa) 1. 249S 



Chromic oxide (Cr^Os) .2392 



Ferric oxide (Fe203) 14.2360 



Ferrous oxide (FeO) 19.0630 



Nickel oxide (NiO) 2.6057 



Cobalt oxide (CoO) .0904 



Mangauous oxide (MnO) 1.9302 



Lime (CaO) 2.322 



Magnesia (MgO) 8.6711 



Soda (Na^O) 1.323 



Potash (K2O) .3265 



Ammonia (NH4OH) .1042 



Humic substance 6.41 



Combined water 7.812 



99. 4728 

 M. Pisani gives results as follows (the material likewise dried 



at 110° C.) : Percent. 



Silica (SiO^) 26.08 



Magnesia (MgO) 17.00 



Protoxide of iron (FeO) 7.78 



Lime (CaO) 1.85 



Soda (Na^O) 2.26 



Potash (K2O) .19 



Oxide of manganese . 36 



Alumina (Al.Os) .90 



Chrome-iron . 49 



Magnetite -. 15. 77 



Sulphide of iron 13.43 



Water and supposed organic matter . 13. 89 



100. 00 



