144 MEMOIRS NATIONAL ACADEMY OF SCIENCES, VOL. XIII. 



Huntington 10 noted the presence of tsenite in the form of thin elastic foil separable from the 

 meteorite. He 17 .also gave the following description of the specimens of the meteorite in the 

 Harvard collection: 



Cosbys Creek, Cocke County, Tennessee, U. S. A. 



Mass of 12.750 grams. — One polished face, showing great variation in structure. Portions of the surface show regular 

 and well-marked Widmanstatten figures, while other parts show only irregular polygonal masses with no appearance 

 of crystalline structure. Moreover, bright nickeliferous iron appears abundantly in some places, while other portions 

 of the surface are entirely free from it. The exterior shows a very octahedral structure, and the plates are separated by 

 a thick foil of schreibersite, which can be easily detached from the iron. (Smith collection.) 



Mass of 451 grams. — One polished face showing characteristic Widmanstatten figures with sections of bright nickel- 

 iron. The exterior shows very striking octahedral structure, and several of the octahedral faces have been polished and 

 etched, showing no figures. Contains a very large nodule of troilite. (Smith collection.) 

 Sevier County, found in 1845, but evidently identical with Cocke County. 



Mass of 7.710 grams. — Mass with two cut faces, one face containing a large nodule of graphite. The exterior shows 

 beautiful octahedral structure. (Smith collection.) 



Mass of 70 grams. — Nodule of graphite, formerly weighed 80 grams, but has been cut. Also numerous other nodules 

 of graphite and troilite. (Smith collection.) 



Mass of 711 grams. — Complete individual, containing a large nodule of graphite and showing all the characteristics 

 structure of the Cocke County iron. This specimen was presented to the cabinet by Prof. N. S. Shaler and is reported 

 to have come from Lebanon County, Tenn., but is evidently the same as the Sevier and Cocke County irons. 



Fletcher 1S described crystals of graphitic carbon, cubo-octahedral in form, visible in some 

 of the crevices of a large graphitic nodule from the meteorite. 

 Meunier 19 grouped the meteorite as arvaite. He states : 



The schreibersite which abounds is in the form of an irregular network and the metal gives very imperfect Wid- 

 mannstatten figures. There is considerable carbon, and Fletcher has noted cliftonite. 



Huntington 20 regarded a number of the Tennessee meteorites as belonging to the Cosby 

 Creek find. He also described an octahedron found in graphite from the Cosby Creek iron 

 as f ollows : 



While examining a nodule of graphite formerly obtained by J. Lawrence Smith from the Sevier County iron, it was 

 accidentally broken and showed in its interior what appeared to be a skeleton octahedron of graphite three-eighths of 

 an inch in diameter, and with all but one of its faces sufficiently perfect for measurement by an application goniometer. 

 This striking feature at once suggests that this also may be a pseudomorph after diamond. 



Cohen 21 found that the meteorite acted like soft iron in not acquiring permanent magnetism. 



The distribution of the meteorite recorded by Wulfing 22 is 98,637 grams. The British 

 Museum has 52+ kg.; Harvard, 21+ kg.; Tubingen, 12+ kg.; and numerous other collections 

 the remainder. 



BIBLIOGRAPHY. 



1. 1840: Troost. Description and analysis of a meteoric mass found in Tennessee, composed of metallic iron, 



graphite, hydroxide of iron, and pyrites. Amer. Journ. Sci., 1st ser., vol. 38, pp. 250-254. 



2. 1842: Shepard. Analysis of meteoric iron from Cocke County, Tennessee, with some remarks upon chlorine in 



meteoric iron masses. Amer. Journ. Sci., 1st ser., vol. 43, pp. 354-359. 



3. 1843: Partsch. Meteoriten, p. 117. 



4. 1847: Shepard. Report on meteorites. Amer. Journ. Sci., 2d ser., vol. 4, pp. 83-85. 



5. 1853: Joy. Analyse des Meteoreisens von Cosbys Creek. Ann. Chem. Pharm., Bd. 86, pp. 39-43. 



6. 1857: Bergemann. Untersuchungen von Meteoreisen. Ann. Phys. und Chem., Poggendorff, Bd. 100, pp. 



254-255. 



7. 1859-1863: von Reichenbach. No. 12, pp. 457, 458, 460; No. 15, pp. Ill, 112, 127, 128, 129; No. 16, pp. 253, 



254, 257-258, 263; No. 17, p. 265; No. 20, pp. 621, 623, 625, 634; No. 21, pp. 577, 578, 579, 586; No. 21a, pp. 172, 

 173, 174, 176. 



8. 1862: Rammelsberg. Ueber das Schwefeleisen der Metoeriten. Monatsber. Berlin. Akad., pp. 689-691. 



9. 1863: Rose. Meteoriten, pp. 57-58 and 59. 



10. 1864: Rammelsberg. Ueber das Schwefeleisen der Meteoriten. Ann. Phys. und Chem., Poggendorff, Bd. 121, 



pp. 366-367. 



11. 1875: Smith. Troilithe, sa vraie place mineralogique et chimique. Comptes Rendus, Tome 81, pp. 976-978. 



12. 1876: Smith. Carbon compounds. Amer. Journ. Sci., 3d ser., vol. 11, pp. 392, 393, 434, and 435. 



13. 1878: Smith. On the composition of the new meteoric mineral Daubreelite, etc. Amer. Journ. Sci., 3d ser., vol. 



16, p. 272. 



