D. Fisher — Meteorite from St. Croix Co., Wisconsin. 383 



independent of the confirmatory evidence afforded by the cir- 

 cumstances of its history, would make it probable that its fall 

 did not precede by many months the date of its discovery. 



A careful analysis of the iron was made by the writer and 

 his assistant, Mr. Chas. G. Allmendinger, with the following 

 results : 



1st 2d 



Sp. gr. 7-601 — 7-703 (Two different pieces). 



Iron v - - * 89-78 



Nickel 7-655 



Cobalt 1-325 



Phosphorus . -512 



Silica -562 



Carbon .. traces 



Copper _- traces 



Tin traces 



99-834 



It contained nodules of troilite, 3 appearing in one section, 

 from 3 mm to 12 mm in diameter. No other inclosures were detected 

 by me. 



I am indebted to Mr. Geo. F. Kunz for sections cut from the 

 mass and polished for etching, and I leave to him the descrip- 

 tion of the Widmanstatten figures, etc. The meteorite now 

 forms a part of the collection of Yale University at New 

 Haven. 



Note by Me. George F. Kunz. 



When dilute nitric acid is applied to the St. Croix County 

 iron, the Widmanstatten figures quickly appear, but unlike the 

 Glorieta and Staunton meteorites, it could not be etched to any 

 depth, because on long continued application of the acid, the entire 

 surface of the iron rapidly dissolves away, leaving only projecting 

 points of taenite. Hence it was found impossible, as had been 

 at first intended, to reproduce the figures directly from an electro- 

 type taken from the iron. The figures are cubical rather than 

 octahedral in arrangement and more closely approach the Jewellite 

 group of Meunier, particularly the Dickson County iron; in form 

 the entire arrangement resembles the Schwetzite Werchne-Udinsk 

 Siberia group, but the figures are about one-third their diameter. 

 It also resembles somewhat the Trenton, Wisconsin iron, but still 

 differs from all of these. Troilite is present in nodules 5 to 10 mm 

 in diameter and also filling the irregular fissures some 50 mm long 

 and 1 to 3 mm wide. The figures, shown on Plate V, are an exact 

 reproduction natural size by the admirable Kurtz process. 



