THREE NEW CHILIAN METEORITES. 23I 



(Plate 25, fig. 2) is in the shape of a sickle, with a main arm five 

 centimetres wide, tapering thence along its curve to a sharp point. 

 Its length across the curve is 12.7 cm., and vertically 7.8 cm. Its 

 average thickness is 3^ cm. Its weight is 1,207 grams. 



This is singularly well preserved, with no signs of oxidation 

 and without marks or bruises upon one of its faces. That face 

 is sculptured over its entire area by a series of shallow cavities or 

 pittings, which are in general rudely circular and about i cm. in 

 diameter, but a few of them along the outer curve of the mass are 

 so lengthened and confluent that they produce two shallow valleys 

 I cm. in width and prolonged for 6 cm., with a sharp crest about 

 8 mm. high between them. These valleys are in their turn replete 

 with many small folds or wrinkles not more than 2 mm. in height. 

 A crust or skin of a fine black color covers this entire face. The 

 opposite face is covered over its upper or peripheral portion with 

 pittings which are somewhat larger (8 to 10 mm.) across, with pro- 

 portional depth, and in all cases with circular rims. The lower 

 half of both limbs is, upon this rear side of the mass, worn or 

 decomposed away, the pittings being dimmed or entirely oblit- 

 erated. The small fragment which I possess of this iron shows on 

 its etched face of 3 square centimetres, well-marked Widmann- 

 staten figures with lamellae running very evenly i mm. in breadth, 

 thus giving this iron place as a medium octahedrite in Brezina's 

 classification. An analysis made by Professor Henry W. Nichols, 

 chemist of the Field Museum of Natural History of Chicago, 

 gives: — Nickel, 5.37 per cent., Iron, 95.97 per cent. 



