148 BULLETIN (M, UNITED STATES NATIONAL MUSEUM. 



gray stone, sufficiently compact to receive a polish. Chondrules 

 abundant. Metallic portion inconspicuous to the unaided eye. Min- 

 eral composition: Olivine and orthorhombic and monoclinic pyrox- 

 enes, with some isotropic matter, metallic iron, and* iron sulphide 

 (pi. 34). 

 Chemical analysis by 'Whitfield yielded as follows: 



Per cent. 

 Silica (SiOj) 3L 06 



Alumina (AI3O3) 4.30 



Phosphoric acid (PjOb) .25 



Chromic oxide (CraOs) .41 



Ferric oxide (FcaOs) 18.15 



Ferrous oxide (FeO) 13.07 



Manganous oxide (MnO) .26 



Nickel oxide (NiO) 1.45 



Cobalt oxide (CoO) .15 



Lime (CaO) 2.13 



Magnesia (MgO) 2L 21 



Soda (NazO) 3.96 



Potash (K2O) .07 



Vanadium oxide (VaOc) Trace. 



Water (H=0) ^ 3.07 



r(S) . 19 



Troilite^ (Fe) . 32 



100. 05 

 Considering the metallic portion alone, the results were as follows, 

 in totals: 



Per cent. 

 Iron 25. 866 



Chromium . 127 



Nickel 1. 470 



Cobalt . 090 



Manganese . 210 



Vanadium Trace. 



27. 763 



Gift of the American Museum of Natural History. 

 References.— Q^o. P. Merrill, Proc: U. S. Nat. Mus., vol. 32, 1907, 

 pp. 59-61 ; Mem. Nat. Acad. Sci., vol. 14, 1916, p. 16. 



SENHADJA, AUMALE, CONSTANTINE, ALGEBIA. No. 150. 



Stone, Cwa. Weight, 18 grams. Fragment with light brown crust. 

 Fell between 11 a. m. and 12 m. on August 25, 1865. Fall accom- 

 panied by usual report. Two stones fell at points some 4,800 meters 

 apart. Original weight of both masses, 50 kilograms. Seems never 

 to have been analyzed or subjected to microscopic examination; 

 nickel, iron, phyrrhotite, chromite, in ash-gray silicate groundmass. 



Reference. — Daubree, Compt. Kend., vol. 62, 1866, p. 72. 



