HANDBOOK OF THE METEORITE COLLECTIONS. 



133 



to have been transcendently beautiful, hardly equaled or surpassed 

 by any previous occurrence of the kind. But one fragment fell to 

 the ground, so far as known. This did not weigh over 400 grams. 

 Analyses by J. Lawrence Smith yielded : 



Constituents. 



SUica{SiOj) 



Iron protoxide (FeO) . . 



Alumina (AI2O3) 



Lime(CaO) 



Magnesia (MgO) 



Chromic oxide (CrjOs) . 

 Soda(Na20) 



Soluble in 

 HCl. 



Per cent. 

 34.55 

 27.75 



Trace. 



Trace. 

 36.38 



.46 



99.14 



Insoluble 

 in HCl. 



Per cent. 



57.81 



11.04 



.23 



5.31 



24.97 



.10 



The metallic portion yielded: 



Per cent. 



Iron (Fe) 94.49 



Nickel (Ni) 4.12 



Cobalt (Co) .51 



99.12 



From the results were calculated the mineral proportions as 



follows : 



Per cent. 



Bronzite and pyroxenic minerals 46. 00 



Olivine 41. 00 



Nickel-iron 10. 00 



Troilite 3.00 



Cliromite • 15 



100. 15 

 Reference. — J. L. Smith, Amer. Journ. Sci., vol. 14, 1877, p. 219. 



RODEO, DTJBANGO, MEXICO. No. 357. 



Iron, Om. Etched slab about 20 by 17 cm., weighing 1,782 grams. 

 From a mass weighing 44.1 kilograms. Found about 1852 and now 

 in the Field Museum, Chicago. Analysis by H. W. Nichols yielded : 



Per cent. 



Iron (Fe) 89.84 



Nickel (Ni) 8.79 



Cobalt (Co) .28 



Copper (Cu) .07 



Phosphorus (P) .80 



Sulphur (S) .02 



Carbon (C) .09 



99.89 



