Am. Jour. Sci., Vol. XLIil, 1892. 



Plate XIII. 



Fig. 1 . — An etched section of the meteoric iron from Floyd Mountain. In this the 

 hexahedral structure of the iron is prominent on a larger part of the surface. In a few 

 places this is broken by the granular particles. Very prominent are the parallel mark- 

 ings of the elongated rhabdite cr}'stals. 



Fig. 2. — A similar etched section from nearer the interior of the mass. In this mass 

 the granular particles are more plentiful. The sheen is more apparent in diagonal bands. 



Fig. 3. — A natural sized view of the meteoric iron of Sierra de la Ternera, showing 

 the finger-like markings and depressions with which the entire mass is covered. 



