166 BULLETIN 94, UNITED STATES NATIONAL MUSEUM. 



Reference. — E. H. von. Baumhauer, Pogg. Ann., vol. 66, 1845, 

 p. 465. 



VACA MUERTA (SIERRA DE CHACO), ATACAMA, CHILE. No. 1. 



Stony-iron, Grahamite. Weight, 432 grams ; rouglily cubical mass 

 with portion of original surface. Date of fall unknown; found 

 prior to 1862. The Museum sample was received from the Univer- 

 sity of Santiago, labeled as found in 1862, and is probably from the 

 sample described by Professor Domeyko.^ The composition of the 

 metallic and silicate portions of this, as given by Domeyko, is: 



Metallic : Per cent. 



Iron (Fe) 88 .G 



Nickel (Ni) 11.4 



100.00 

 Silicate : 



Silica (SiOa) 43.22 



Alumina (AUOs) 7. GO 



Ferrous oxide (FeO) 2G. 52 



Magnesia (MgO) 6.60 



Lime (CaO) : 4.27 



Soda (NasO) .40 



Sulphur (S) 4.341 ^^ g^ 



Iron (Fe) 7.50) 



100. 45 



The mineral composition of the Sierra de Chaco stone, which is 

 considered the same, is given as nickel-iron, pyrrhotite, olivine, 

 enstatite, augite, and plagioclase. For the Mejillones iron Domeyko 

 gives the following composition : 



Per cent. 



Iron 9i^- 4 



Nickel 3. 8 



Cobalt • 1 



Schreibersite . 9 



100.2 



Gift of the University of Santiago, Chile. 



/?e/ermces.— Domeyko, Compt. Eend., vol. 58, 1864, p. 551, and 

 vol. 81, 1875, p. 599. L. Fletcher, Min. Mag., vol. 8, 1889, p. 223. 



VERAMIN (KARAND), TEHERAN, PERSIA. Nos. 225, 410. 



Stony-iron, Mesosiderite. Two pieces, weighing about 10 grams, 

 from a mass weighing some 45 Idlograms which fell in February, 1880. 



Reference. — H. A. Ward, A trip after meteorites. The Mineral 

 Collector, vol. 6, June, 1899, p. 59. 



iComptes Rendus, vol. 58, 18G4, p. 551. 



