METEORITES OF NORTH AMERICA. 



315 



12. 1889: Castillo. Catalogue, p. 7. 



13. 1890: Fletcher. Mexican Meteoritea, Mineral. Mag., vol. 9, pp. 122, 123, 124-125, 131-132, 137-140, 150, and 151. 



14. 1893: Meunier. Revision des fers meteoriques, pp. 52 and 53. 



15. 1895: Brezina. Wiener Sammlung, pp. 269 and 272-273. 



MORRISTOWN. 



Hamblen County, Tennessee. 



Here also the Safford meteorite and Hamblen County. ■ 



Latitude 36° 14' N., longitude 83° 32' W. 



Iron-stone. Grahamite of Brezina . 



Found 1887; described 1893. 



Weight, 16 kgs. (36 lbs.). 



This meteorite was first described by Eakins ' as follows: 

 This meteorite which was found in September, 1887, on a ridge about 6 miles west-southwest from Morristown, 

 Hamblen County, Tennessee, was first recognized and brought to notice by Prof. J. M. Safford, who, in course of an 

 inspection of a collection of iron ores, recognized some fragments as undoubtedly meteoric. Prof. Safford at once 

 took steps to secure these pieces and visited the locality where they were found. Here he succeeded in finding 

 a few more fragments, which had the appearance of having been buried in the soil and afterwards turned up by the 

 plow. These various pieces now in Prof. Safford 'a possession have a total weight of about 36 pounds, two of them 

 weighing respectively 11 pounds and 13 pounds. A specimen sent by Prof. Safford to the United States National 

 Museum, and now in its collection furnished the material for this investigation. Most of the pieces show much surface 

 oxidation, a fresh fracture showing a gray color with numerous metallic particles of nickel-iron. The analysis was 

 made in the usual way for this class of meteorites; that is, by separating the metallic and siliceous portions, both by 

 picking and by the magnet and analyzing separately the nickeliferous iron, the silicates soluble in hydrochloric acid, 

 and those insoluble. The metallic and siliceous portions of this meteorite are approximately equal in amount, the 

 iron being quite malleable and unusually tough. The analysis is as follows: 



Nickeliferous iron. 



Fe Ni 



90. 92 7. 71 



Co 

 0.80 



Cu 

 trace 



P 



0.19 



S 

 0.04 



=99. 66 



Siliceous portion. 



Soluble in HC1. Insoluble in HC1. 



Analy- Calculated Molecular Analy- Calculated Molecular 



eis. to 100%. ratios. sis. to 100%. ratios. 



Si0 2 16.79 45.61 0.760 31.47 50.67 0.844 



A1,0 3 8.33 22.62 0.222 9.25 14.89 0.146 



Cr 2 2 0.82 1.32 0.009 



FeO 4.88 11.73 0.163 6.55 10.55 0.147 



NiO 0.39 1.06 0.014 



MnO .... .... 0.47 0.76 0.010 



CaO 5.19 14.09 0.252 2.24 3.61 0.64 



MgO 1.34 3.64 0.091 11.16 17.98 0.449 



KO 0.02 0.03 



Na 2 .... 0.12 0.19 0.003 



P 2 6 0.46 1.25 0.009 



S 0.25 .... .... 



37. G3 100.00 62.10 100.00 



In calculating the analysis of the soluble portion to 100 per cent, the S and an amount of iron (0.56 per cent FeO) 

 sufficient to form FeS are first deducted. In many stony meteorites olivine is a considerable constituent, generally 

 forming the bulk of the soluble silicate; but in this case the analysis shows olivine to be present in but small propor- 

 tion, if at all. It is interesting to note that both the soluble and insoluble portions have practically the same mole- 

 cular ratios, the soluble portion reducing itself essentially to RAl 2 Si0 6 in which R=CaFe; and the insoluble part 

 to the same formula where R=MgFe, both being equivalent to aluminous enstatite or pyroxene. At the time this 

 analysis was made it was impracticable to supplement the work with the proper microscopical examination of sec- 

 tions, which doubtless, in conjunction with the chemical evidence, would have satisfactorily determined the minerals 

 present. Without this microscopical knowledge, however, little that is definite can be said except that there seem 

 to be present two similar molecules; the one in which lime predominates being soluble, and the other, magnesian, 



