G. F. Kunz — American Meteorites. 469 



Si0 2 45-88 



A1„0 3 7-89 



FeO 19-73 



CaO 6-02 



MaO -.17-96 



NTS 1-67 



FeS -54 



99-69 

 " From the nickel and sulphur and iron we have the percent- 

 age corresponding to the formula (Ni, Fe) S, for the troilite. 

 Taking the piece as it was received the specific gravity is 4*484. 

 Of the finely ground rocky portion, free from metallic particles as 

 far as possible, I have made quite a number of analyses, to learn 

 the nature of the insoluble mineral, and as far as I can judge it is 

 enstatite only and the soluble part is a lime-iron silicate with con- 

 siderable Al 2 O s . Of the insoluble in dilute hydrochloric acid the 

 following is the analysis. 



Si0 9 __ 52-39 = -87 



A1 2 3 7-11 



FeO .... 14-68 -20 



CaO 4-49 -08 V "81 



MgO 21-33 -53 



100-00 

 " Ratio of SiO„ : R"0 == -87 : 81 which agrees pretty well with 

 enstatite ; but here the MgO is replaced by as much FeO and the 

 presence of A1 2 3 makes the ratio vary a little from the normal 

 1 : 1. Deducting all the S as NiS and the Fe to correspond to 

 the remaining S from the soluble part, we have for the per- 

 centages of the soluble the following : 



SiO„ 26-95 



A1„0 3 17-69 



FeO -•_ 35-98 



CaO 15-98 



MgO .'.. 3-40 



100-00 



" The little MgO here probably comes from the slight solubility 

 of the enstatite." 



On looking up the literature on this subject the following 

 facts presented themselves. 



Prof. Shepard states,* in reference to the Forsyth, Taney Co., 

 Missouri iron, that his first information regarding it was derived 

 from N. Aubushon of Ironton, who reported that a small speci- 

 men of very curiously knitted, malleable ore, of a white color 

 resembling silver had been sent him two or three years before by 



*This Journal, II, vol. xxx, 1860, p. 205. He had so little of it, that it does 

 not appear on any catalogue, not even in the Shepard collection at Amherst Col- 

 lege, Mass. 



