METEORITES OF NORTH AMERICA. 405 



i • 



Cohen 2 published an analysis by Fischer which was as follows : 



Fe Ni Co Cu P Residue 



93.14 5.73 0.99 0.10 0.15 0.02 =100.13 



Huntington 3 saw in the meteorite a resemblance to the Coahuila irons, and suggested that 

 it might be a part of the same fall. His account is as follows : 



The whole character of this iron, including the etched surface, closely resembles that of the Coahuila irons. On 

 breaking small slabs of the Scottsville block it showed the same cleavage as the Saltillo iron. The fine parallel cracks 

 appear under the first blows of the hammer, and then the slab breaks, regardless of the way it is held, in two directions 

 only at angles of about 132° and 53°, presenting a single cleavage plane with the marked flaky appearance characteristic 

 of the Saltillo iron. That these masses were found in places so remote does not seem to preclude their having belonged 

 to one individual, as appears from the case of the Rochester (Indiana) meteorite. It therefore is possible that at some 

 remote period an enormous iron meteorite may have passed over the entire breadth of the United States, the main mass 

 reaching Mexico, but large fragments breaking off and falling during its passage across the country. 



Meunier 4 grouped the meteorite as Braunite, and described it as follows: 



It is rich in phosphorus and has a few grains of easily recognizable pyrrhotine. Carbonaceous matter is abundant. 



Brezina 5 made it a normal hexahedrite, and described it as follows: 



The Scottsville iron shows large pittings and a peculiar wrinkling upon the natural exterior; in the section it shows 

 frequently a larger expanse of brass-yellow troilite besides smaller areas of tombac-brown troilite. Occasionally the 

 inclusions are made up of two bodies in both kinds of troilite. Fissures of 5 to 6 cm. in lengthy springing from the 

 exterior surface and running parallel to one another, sometimes end in pockets of troilite. The Neumann lines are 

 numerous, fine, and regular in direction. 



Cohen 6 found that it took on more or less permanent magnetism. Later 7 he described it 

 as follows : 



The quite uniformly distributed etching lines are of exceptional delicacy, and lie very close together; here also 

 occur, as seen under a strong glass, a few systems which are more prominent than the others by reason of their length 

 if not also on account of their much greater distinction. The etching pits are numerous and of unusual size; the luster 

 is uniformly oriented over the entire etched surface, but not always in the same way. Where the pittings are isolated 

 it appears strong and somewhat satiny; in many places, however, there occur also dark particles of a dull luster which 

 may be due to the fact that the pittings are larger here and run together, and the shallow depressions diffuse the reflected 

 light and so appear darker. The etching lines run unchanged through both portions. The small rhabdites, which 

 according to the content of phosphorus must be present in considerable numbers, escape direct observation. The 

 larger needles up to 1.5 mm. in length are massed together in a few places; here the etching surface has a slightly 

 roughened appearance, probably due to the fact that the needles are enveloped with a covering of nickel iron less 

 assailable by acid. The crust appears to be an oxidized fusion crust, in proximity to which some iron glass occurs. 



Scottsville takes on strong permanent magnetism and has quite strong coercive force; after intense heating and 

 slow cooling it behaves like malleable iron, while quick cooling after heating to redness has no effect. Leick determined 

 the specific magnetism at 0.19 units per gram. 



Analysis by Knauer: 



Fe Ni Co Cu Cr P S C Residue 



94.03 5.33 0.95 0.04 0.02 0.23 0.07 0.00 0.01 =100.68 



Specific gravity, 7.7959. 

 The meteorite is distributed. Vienna possesses 1,570 grams, Ward 1,153 grams. 



BIBLIOGRAPHY. 



1. 1887: Whitfield. On the Johnson County, Arkansas, and Allen County, Kentucky, meteorites. Amer. Journ. Sci., 



3d ser., vol. 33, pp. 500-501. (Analysis.) 



2. 1889: Cohen. Sao Juliao. Neues Jahrb., 1889, vol. 1, pp. 217, 227. 



3. 1889: Huntington. The crystalline structure of the Coahuila irons. Proc. Amer. Acad. Arts and Sci., vol. 24, 



p. 33. 



4. 1893: Meunier. Revision des fers meteoriques, pp. 15 and 19-20. 



5. 1895: Brezina. Wiener Sammlung, p. 291. 



6. 1895: Cohen. Meteoreisen-Studien IV. Ann. K. K. Naturhist. Hofmus. Wien, Bd. 10, pp. 82, 85, 88, 89, and 93. 



7. 1905: Cohen. Meteoritenkunde, Heft 3, pp. 217-220. 



