214 MEMOIRS NATIONAL ACADEMY OF SCIENCES, VOL. XIII. 



Swathing kamacite. — The natural surface of the plate 1.7 to 2.3 mm. thick showed, especially on the boundary 

 toward the schreibersite, conchoidal depressions. One recognizes in the latter the impressions of the rounded faces of 

 the large schreibersite crystals which are thus doubtless older. The swathing kamacite has the hardness of steel, is 

 very tough, tin-white grading to silver-white, and easily soluble in hydrochloric acid. In contrast to the schreiber- 

 site and tsenite it does not oxidize quickly. This is remarkable since the nickel-poor compounds usually oxidize 

 more easily than the nickel-rich. Under I follows the result of the analysis; under la the composition after removal 

 of the schreibersite and calculation to 100. 



Fe 93. 77 



Ni 



Co 



P 



C 



Cu 



101.29 100.00 

 The composition is thus like that of the normal kamacite and further analyses are needed before one can decide 

 whether the swathing kamacite contains a somewhat higher content of nickel and cobalt. 



Meunier 9 remarks as follows regarding the troilite of the meteorite: 



The pyrrhotiue sometimes occurs in a peculiar manner, filling the angular spaces left by the apparent cracking 

 of the mass, which left open spaces as receptacles for the sulphurous emanations. 



Brezina u gave the following account: 



This iron is, like Butsura, an example of a meteorite which burst before reaching the earth and suffered partial 

 fusion after separation of the pieces. Of the nine hitherto known individuals of this fall, of 67.4, 51.7, 24.3, 1.2, 1.1, 

 1.0, and 2.5 kg. weight, also two small individuals of unknown weight, there are in our collection four complete and 

 three complete sections obtained at one time. All are highly oriented; the three larger ones have remains of the fusion 

 crust in many places, and always only on the same side, which, from the rounded appearance of the surface elements, 

 gives evidence of being the primary face, while the side characterized by its hackly fracture as the recent, second- 

 ary face, presents no fusion crust. This condition is distinctly noticeable on the second largest specimen of the fall 

 (51.7 kg.). Upon the side having the primary surface, which also bears the apex of the total mass, the streaks spread 

 out like disheveled hair, and this is true not only of the fusion crust but also of the underlying iron particles, running 

 over the side margins in puffy ridges. Kunz supposed that this phenomenon was caused by the forcing of the meteorite 

 through the sand in its fall. The three small individuals of 1.0 to 1.2 kg. weight have a highly oriented form, while on 

 each is to be distinguished a convex face covering almost half the exterior of pronounced primary character, with very 

 flattened forms and a row of secondary facets of a hackly, slightly fused fracture. These three individuals had lain in 

 a loamy soil strongly charged with iron and still bore much of this material upon them. The latest, just recently dis- 

 covered piece, is much rusted and has the form of a splinter of iron 30 cm. long by 8 cm. in thickness, which, like all 

 other individuals of this fall, has upon one side a primary surface and upon the other a more or less secondary surface. 

 Very unique formations may be seen on the section of the seventh find of this fall; it is a triangular plate of 109 gr. 

 weight. Of the three small facets one is concave and possesses a pronounced primary character, considerably flat- 

 tened and with remains of the fusion crust; the other two facets are, with the exception of the portions adjacent to 

 the concave face, decidedly secondary, hackly, and withal slightly convex. Along the primary surface portion may 

 be seen a zone of alteration 1.2 mm. wide, while the secondary face for the most part is bordered with bands of envel- 

 oping kamacite, which in the Glorieta iron usually incloses the strongly developed octahedral schreibersite plates. 

 The Widrnannstatten figures show an extensive, extremely regular bending of the whole mass, which reaches a total 

 amount of 65°. As a result, the ends of the primary faces are bent inward (concave), hence the secondary faces 

 are bent outward. The texture of the Glorieta iron, as shown by the etched surface, is a very mixed one, because 

 of the alternation of coarse and fine structure. The bands are mostly very long, up to 12 and 15 mm., more or less 

 notched, straight, or bent with the entire iron, behind the dominant areas mostly inconspicuous; taenite normally 

 developed; fields predominating, mostly filled with repetitions of the longer bordering bands, sometimes comb-like 

 with both such border bands or with dark-gray plessite, or finally with two or more such fillings. The kamacite is 

 very resistant to acids, and is coarsely flecked. Numerous schreibersite laminse, often as much as 10 cm. long, some- 

 times show crystalline borders and are enveloped in kamacite bands 2 mm. broad, which also inclose accompanying 

 troilite nodules. The rupture of the piece has occurred for the most part along such laminse of schreibersite. The 

 border kamacite clinging to the edges of a piece then often appears like a zone of alteration. On a small end piece of 

 the largest mass the entire natural surface is lumpy like kneaded dough and a zone 1.5 to 3 mm. thick, resembling 

 border kamacite, runs around the section surface. Grains of cohenite seldom occur in the kamacite. Glorieta has 

 many points of similarity in structure with Joe Wright. Here also belongs, apparently, the Canon City meteorite, 

 published by Shepard. 



In this last opinion Brezina is in error, as was shown by Ward (see Canyon City). 

 Cohen n made determinations of the magnetism and specific gravity of the meteorite. 



