482 SMITHSONIAN MISCELLANEOUS COLLECTIONS [vol.. 50 



suits obtained by him in isolating small colorless octahedral diamonds 

 and also yellow and black particles having the hardness of diamond. 

 Other papers by Mallard, 1 Daubree, 2 Friedel, 3 and Moissan 4 were all 

 confirmatory and corroborative of Huntington's results. 



Brezina, 5 in 1893, noted the finding of the iron (which he wrongly 

 located as in New Mexico), and called attention to its crystallo- 

 graphic structure and occurrence about the crater — a fact which 

 raised in his mind the question of the latter being incidental or con- 

 sequent. In 1895° ne returned to the subject, described the external 

 appearance of the iron as found, and noted that natural etched sur- 

 faces showed the iron to be composed principally of kamacite plates 

 without appreciable tasnite. He noted also the presence of cohenite 

 and troilite-graphite nodules, and that the tasnite residues lying 

 parallel with the octahedral faces were as strongly marked as in 

 the freshly etched iron. 



Derby, in 1895, 7 published the results of investigations upon the 

 chemical and mineralogical nature of the iron, and reported the 

 occurrence of tasnite, schreibersite (and rhabdite), cohenite, diamonds 

 (probably), and amorphous carbon, with traces of chromium and 

 a relatively high percentage of copper. Analyses of the tasnite and 

 schreibersite were given. The form of the irons (see pi. lxxiii), he 

 suggested might be due to their having been "small irregular me- 

 tallic masses scattered through the stone matrix of a mesosiderite," 

 and he ventured the hypothesis that the mass on arriving in our 

 atmosphere, as a mesosiderite, contained unusually large metallic 

 nodules that became separated by the explosion attending the fall, 

 and probably also by consequent decay and disaggregation of the 

 stony matrix. 



Cohen, in 1900 (Meteoreisen Studien, XI), made similar examina- 

 tions with results confirmatory of Derby. 



Moissan, in 1904^ published important chemical contributions, 

 giving analyses of the iron and the included troilite nodules, and 

 announced the finding of carbon in three forms — amorphous, as 

 graphite, and the diamond. He also announced the finding in his 

 insoluble residues from the iron of a green mineral in the form of 



1 Comptes Rendus, vol. 114, 1892, p. 812. 



3 Ibid., vol. 114, 1892, p. 812, and vol. 116, 1893, p. 345. 



'Ibid., vol. 115, 1892, p. 1037, and 116, 1893, p. 290. 



* Ibid., vol. 116, 1893, p. 288. 



* Ueber Neue Meteoreisen, 1893. 

 ' Wien Sammlung, 1895, P- 288. 



' American Jour. Sci., vol. 49, 1895, p. 101. 

 8 Comptes Rendus, vol. 139, 1904, p. yy2>- 



