58 BULLETIN 94, UNITED STATES NATIONAL MUSEUM. 



with traces of copper, manganese, and carbon. The mineral composi- 

 tion as calculated by ^►lallet is : 



Per cent. 



Eastatite 44. 73 



Olivine 33. 48 



Maskelynite 6. 87 



Nickel-iron 8. 63 



Iron rust 3.03 



Schreibersite . 76 



Pyrrhotite 2. 14 



Chromite . 08 



99.72 

 Gift of D. M. Barringer. 

 Reference.— 3 . W. Mallet, Amer. Joiirn. Sci., vol. 21, 1906, p. 347. 



COOPERTOWK, ROBEETSON COUNTY, TENNESSEE. No. 30. 



Iron, Om. Section of mass 16 by 10 cm., etched, weighing 633 

 grams; from a mass weighing nearly 17 kilograms (37 pounds) found 

 in 1860. Is of interest from the perfection of the .Widmanstiitten 

 figures (see pi. 20). An analysis by J. L. Smith yielded: 



Per cent. 



Iron (Fe) 89.59 



Nickel (Ni) 9.12 



Cobalt (Co) .35 



Phosphorus (P) .04 



Copper (Cu) Trace. 



99.10 

 Gift of D. Crockett. 

 Reference. — J. L. Smith, Amer. Journ. Sci., vol. 31, 1861, p. 266. 



COSBY'S CREEK, COCKE COUNTY, TENNESSEE. Nos. 70, 495. 



Iron, Og. Thirty-four grams of fragments from an iron found 

 in 1837. Analysis by Dr. J. Fahrenhorst yielded : 



Per cent. 



Iron (Fe) 91.49 



Nickel (Ni) 6.36 



Cobalt (Co) .72 



Copper (Cu) .02 



Phosphorus (P) .40 



Sulphur (S) .81 



Carbon (C) .20 



100.00 

 The mineral composition is given as: 



Per cent. 

 Nickel-iron 94. 95 



Schreibersite 2. 63 



Troilite 2. 22 



Graphite, carbon, and silicates . 20 



100.00 



