244 MEMOIRS NATIONAL ACADEMY OF SCIENCES, VOL. XIII. 



An abbreviated form of the above account was published by the same authors in the Ameri- 

 can Journal of Science the next year. 2 



Brezina 3 raised the question whether this meteorite belonged to Hollands Store. 



Berwerth 4 characterized the iron as "kamacite (hexahedral iron) with zones of octahedrally 

 oriented grains." 



Farrington 5 placed it among the hexahedrites, since he did not consider the granular par- 

 ticles essential; he also mentioned two small troilite nodules. 



Cohen 8 thought with regard to the question raised by Kunz and Weinschenk as to the 

 origin of the peculiar structure, that either the granular portion was the original from which, by 

 later crystallization, the unitary portions arose, or that a low content of nickel in the granular 

 portions gave low crystallizing power. He calls attention to the fact, however, that the content 

 of nickel, instead of being low, corresponds with that of other hexahedrites. He also criticises 

 Berwerth's classification of the meteorite as not agreeing with his description. If Berwerth 

 means, he states, "that the zones run parallel to the octahedral surfaces then the meteorite would 

 not be a granular hexahedrite, to which, however, it was referred by Berwerth." 



The meteorite is more than half (8,085 grams) preserved in the Field Museum collection. 



BIBLIOGRAPHY. 



1. 1891: Kunz and Weinschenk. Meteoritenstudien. — 2: Floyd Mountain, Radford Furnace, Virginia. Mineral. 



und Petrogr. Mitth., Tschermak, Bd. 12, pp. 182-184. 



2. 1892: Kunz and Weinschenk. On two meteoric irons. — 1: Indian valley township, Floyd County, Virginia. 



Amer. Journ. Sci., 3d ser., vol. 43, pp. 424—425. 



3. 1895: Brezina. Wiener Sammlung, p. 346. 



4. 1900: Berwerth. Neue Meteoriten. Ann. K. K. Naturhist. Hofmus. Wien, Bd. 15 (Not), p. 41. 



5. 1903: Farrington. Catalogue of the collection of Meteorites. Publ. Field Columbian Mus., Geol. ser., vol. 2, 



pp. 100-101. 



6. 1905: Cohen. Meteoritenkunde, Heft 3, pp. 237-239. 



Iowa County. See Homestead. 

 Irapuato. See La Charca. 



IREDELL. 



Bosque County, Texas. 



Latitude 31° 53' N., longitude 97° 52' W. 



Iron. Normal hexahedrite (H) of Brezina. 



Found 1898; described 1899. 



Weight about 1,500 grams (3.3 lbs.), of which only about 500 grams (1.1 pounds) were preserved. 



The history and characters of this meteorite have been summarized by Cohen 2 as follows : 



According to Foote, 1 this iron was found in 1898 in a rut 7 inches deep in an old road on the Dudley sheep ranch, 

 5 or 6 miles southwest of Iredell in Bosque County, Texas. It had originally the shape of a large mussell-shell but was 

 broken up into many pieces, and among other things, had been used to replace knife blades. Scarcely a third (500 

 grams) of the original mass, in the form of angular fragments with rusty exterior, can have been preserved; it shows a 

 slight exudation of iron chloride. The occasionally prominent cleavage is explained as dodecahedral. The bright 

 tin -white iron is soft and takes a fine polish; upon etching numerous very small depressions and fine bright lines appear 

 which, for the most part, cross at right angles, but which also occasionally run diagonally. Friable, magnetic schrei- 

 bersite is plentiful in grains and plates 2 mm. in breadth. 



Analysis (Whitfield): 



Fe Ni Co P S 



93.75 5.51 0.52 0.20 0.0G =100.04 



A small piece which I investigated shows a generally irregular rust-covered exterior, besides one freshly-opened 

 surface which is generally even but in places is here and there marked off en ichelon, so that the cleavage may with 

 reasonable certainty be assumed to be hexahedral. Immediately after weak etching numerous uniformly-distributed 

 pittings as much as 0.01 mm. in size, and fine-line systems appear, closely resembling the etching pits and Neumann 

 lines of other hexahedrites. After stronger etching each pit becomes enlarged and between them occur very many 



