Plate 3 



1. Staunton, Virginia; medium octahedrite; Ni-Co 8.16 percent (Whitiield, in Campbell 

 and Howe, 1903). A typical medium octahedrite with a regular pattern, the kamacite 

 bands averaging about 1 mm. in width. Macroetch; three-fifths natural size, ordinary' 

 light. 



2. Grand Rapids, Michigan; fine octahedrite; Xi-Co 10.69 percent. A tjpical fine 

 octahedrite with a regular pattern. Brezina gives the width of the bands as 0.3 mm. Macro- 

 etch; three-fifths natural size, ordinary light. U. S. National Museum. 



3. Carlton, Texas; finest octahedrite; Ni-Co 13.40 percent. This is one of the finest of 

 octahedrites and also one of the most regular and beautiful. Brezina gives the width of 

 the bands as 0.2 mm., although some are narrower. A striking feature of this iron is the 

 numerous large, irregular, elongated inclusions of schreibersite surrounded by swathing 

 kamacite, two of which appear in the photograph. Some of these inclusions reach lengths 

 of 12 or 15 cm. Macroetch; three-fifths natural size, ordinary light. 



4. Four Corners, New Mexico. A fine granular octahedrite with silicate inclusions. 

 The Ni-Co content of the metallic part is 10.16 percent. It shows a pattern of coarse grains, 

 reaching dimensions of 2 or 3 cm., each with an independently oriented octahedral structure. 

 This remarkable iron is apparently unique, though somewhat resembling Copiapo, Chile. 

 The dark areas are silicate. Macroetch; three-fifths natural size, ordinary light. 



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