66 BULLETIN 94, UNITED STATES NATIONAL MUSEUM. 



EL CAPITAN, EL CAPITAN MOUNTAINS, NEW MEXICO. Nos. 169, 209, 345. 



Iron, Om. Fragment showing cleavage, weighing (>0 grams; slice 

 20 by 11 by 2 cm. weighing 753 grams, and end mass 20 by 10 by 5 cm. 

 weighing 4 kilograms. Weight of original mass, 27,500 grams (about 

 61 pounds). Found in July, 1893, and supposed to have fallen in 

 1882. Structure is octahedral with broad bands of kamacite. Analy- 

 sis by H. N. Stokes yielded : 



Per cent. 



Iron (Fe) 00.51 



Nickel (Ni) 8.40 



Cobalt (Co) .60 



Copper (Cii) .05 



SiUcoii (Si) Trace. 



Phosplioru.s (I*) -24 



Sulpliur (S) Trace. 



99.80 

 Sixty-six gram piece, gift of C. E. Biederman ; 753-gram piece, gift 

 of Edward E. Howell. 



Reference. — E. E. Howell, Amer. Journ. Sci., vol. 50, 1895, p. 253. 



ELM CREEK, LYON COUNTY, KANSAS. No. 371. 



Stone, CcO. Fragment weighing 1,120 grams. Found May, 1906. 

 Date of fall unknown. A dark gray, compact stone shoAving numer- 

 ous small points of metal on polished surface, and indistinct chon- 

 drules. Consists of the silicates olivine, and orthorhombic and mono- 

 clinic pyroxenes, and nickel-iron. Analysis by Whitfield yielded: 



Metallic portion, 6.82; silicate portion, 93.18. 



The metal yielded: Iron, 87.13; nickel, 11.30; cobalt, 1.42; man- 

 ganese, 0.15. 



The silicate portion yielded: Silica, 36.76; alumina, 3.10; ferric 

 oxide, 13.23; ferrous oxide, 14.22; chromic oxide, 0.35; lime, 1.62; 

 magnesia, 25.66 ; water, 5.10. 



Recalculated, the following results are olitained to show the bulk or 

 mass composition of the stone : 



Per cent. 



Silica (SiO.) 34.2.5 



Alumina (Al^Os) 2.89 



Ferric oxide (Fe^Oa) 12.32 



FerroiLS oxide (FeO) 13.25 



Chromic oxide (CrsOs) .326 



Lime (CaO) 1- 509 



Magnesia (MgO) 23. 909 



Iron (Fe) 5.94 



Nickel (Ni) .77 



Cobalt (Co) . 09 



Manganese (Mn) .01 



Volatile (H.O) (?) 4.75 



100. 014 



