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H. L. PRESTON 



edge of this pitting. On polishing and etching these cut sur- 

 faces, we found that the iron was octahedral in structure, with 

 well-marked Widmanstatten figures. A feature of this iron is 

 the fact that it etches so readily that the Widmanstatten figures 

 were slightly outlined on an ordinary polished surface, without 

 the use of acid or any other solvent. 



The etched surfaces have numerous fissures from i^ to 

 i}4^"' in width and from 5 to 65""" in length, partly filled with 



Fig. 2. — Section showing Widmanstatten figures. Three-fifths actual size. 



troilite, but mainly with schreibersite. These fissures occur at 

 various angles toward each other, thus breaking to some extent 

 the regularity of the Widmanstatten figures, and are invariably 

 entirely surrounded by kamacite bands. The kamacite bands 

 average from ij4 to 2™"" in width, with the broadest bands gen- 

 erally surrounding the schreibersite-fiUed fissures as seen in Fig. 

 2. The plessite patches which are quite prominent on the etched 

 surfaces show clearly the alternating layers of kamacite and 

 taenite (so-called Laphamite lines) a feature that was first dis- 

 tinguished in another Michigan iron, that of Grand Rapids. On 

 no section were rounded troilite nodules, so characteristic of iron 

 meteorites, found. 



The character of the etched surface of this meteorite in many 

 respects resembles that of Cuernavaca, but the kamacite blades 



