472 MEMOIRS NATIONAL ACADEMY OF SCIENCES, VOL. XIII. 







BIBLIOGRAPHY. 



1. 1876: SHEPARD. Notice of the meteoric stone of Waconda, Mitchell County, Kansas. Amer. Journ. Sci., 3d ser., vol. 



11, pp. 473-^74. 



2. 1877: SMITH. Examination of the Waconda meteoric stone, Bates County meteoric iron, and Rockingham County 



meteoric iron. Waconda meteorite. Amer. Journ. Sci., 3d ser., vol. 13, pp. 211-213 (Analysis). 



3. 1884: WADSWORTH. Studies, pp. 93-94. 



4. 1885: BREZINA. Wiener Sammlung, pp. 168, 177, and 232. 



5. 1895: BREZINA. Wiener Sammlung, pp. 241 and 258. 



6. 1897: WOLFING. Die Meteoriten in Sammlungen, p. 379. 



Waldo County. See Searsmont. 

 Waldron Ridge. See Wallens Ridge. 



WALKER COUNTY. 



Alabama. 



Here also Alabama 1843, Claiborne and Lime Creek, in part, and Morgan County. 



Latitude 33 5(X N., longitude 87 15' W. 



Iron. Hexahedrite (H) of Brezina. 



Found, 1832. 



Weight, 75 kga. (165 Ibs.). 



The history and characters of this meteorite have been summarized by Cohen 22 as follows: 



According to Troost, 1 an iron mass of 75-kg. weight was found in 1832 in the northeast corner of Walker County by 

 a hunter living in Morgan County, who preserved it in his house until 1843; in this year the mass came into the posses- 

 sion of Troost. It was of an irregular oval form, with a smooth exterior covered with a thick coating of rust and afforded 

 a compact, crystalline fracture with noticeable triangular folia. Upon the etched surface appeared lines which formed 

 equilateral triangles, except where elongated at the section surface. Upon cutting into the iron a nodule GJ cm. in 

 size and easily loosened from its matrix was found. It had a thin, glistening, white metallic zone surrounding it 

 (probably troilite with a schreibersite border). The exterior sweat iron chloride, while the interior was free from 

 chlorine. 



The data from Shepard 2 are set aside by the above observations. 



According to Reichenbach 3 > 7 > the nearly half spherical piece covered with a coating of rust about 1J cm. thick 

 contained in his collection was very similar to that of Braunau. It showed no Widmannstatten figures, and consisted 

 almost exclusively of kamacite, which showed no indication of granular structure, but formed a crystalline individual 

 containing, however, delicate patches of plessite bordered with taenite and rich in needles >( taken at that time for 

 taenite !) ; " In the most delicate manner a spray of the finest parallel straight lines runs through the whole, exactly like those 

 of Hauptmannsdorf , penetrating the entire mass of iron and crossed at acute angles by other straight lines also parallel 

 to one another." In addition to the needles, Reichenbach described other accessory constituents: Bronze-colored 

 iron sulphide in roundish nodules as much as 2.5 cm. in size, "Kiesflecke," small particles of graphite, schreibersite 

 alone and grown together with iron sulphide, numerous larger and smaller flakes and granules scattered through the 

 kamacite without any order and parallel banded isinglass on the edges of the mass. Reichenbach emphasized the 

 absence of swathing kamacite and the fact that Walker County belongs to the least complex meteoric irons. The occur- 

 rence of chlorine is mentioned in a way which creates the impression that he did not observe it himself. Reichenbach 

 was evidently convinced that his material was a portion of the Claiborne (Lime Creek) iron described by Jackson, 

 since he cited the analyses of Hayes. Because of the high percentage of nickel given by the latter, he at first compared 

 his piece with Babbs Mill and Cape of Good Hope. 



Rose 12 also compared the Reichenbach section with the Braunau iron; it showed, he said, besides etching lines 

 and cross sections of rhabdite a few large gray concretions of a metallic luster in the form of grains and needles. Accord- 

 ing to Huntington, 14 Walker County shows "octahedral cleavage" and "figures" which fall between those of Butler 

 and Coahuila, although comparing more nearly with the latter. It is, however, coarser and shows more distinctly 

 "Tschermak's Trias." 



So far as Meunier's ls brief mention indicates, it would appear that Walker County is not represented in Paris. 



The following description is based principally upon an end piece from the Tubingen collection, weighing 1,740 

 grams, and having a section surface of 100 sq. cm. 



The exterior is composed of a coating of rust of considerable thickness, but from the state of preservation of the 

 evenly and thickly distributed shallow saucer-like depressions no material alteration of form due to weathering has 

 taken place. 



After weak etching the Neumann lines come out distinctly, of which a few systems by their length (occasionally as 

 as much as 3 cm.) and depth are quite sharply distinguished from the others, although they are only distinctly visible 

 under the microscope. The distribution is very irregular. In a few places they lie closely compacted together, fre- 



