292 REPORT— 1881. 



aflfected its non-solubility in acids. 150 milligrammes of the finely jjul- 

 verised mineral was fused with ten times its weight of sodium bisulphate, 

 and was attacked but not dissolved. Subsequent treatment with sodium 

 carbonate and nitre broke it up, and the results of the analysis were : — 



Chromium oxide 62-71 



Iron protoxide 33-83 



96-54 



While chromite has been known to be associated with meteorites, this 

 is the first instance of its having been found embedded in this manner in 

 the interior of meteoric iron. 



Some of the particles of chromite, when placed in a very intense 

 light, were found to be feebly translucent, and to have a dark reddish- 

 purple colour. This observation, it appears, had already been made by 

 M. Stanislaus Meunier, of Paris. 



1840. — De Gall) Go., Garyfort, Tennessee.^ 



Brezina points out that in Tschermak's Catalogue^ this iron is described 

 as compact, and in Rose's ' Beschreibung und Eintheilung ' it is shown to 

 resemble that from Babb's Mill. A fine section, acquired from Professor 

 L. Smith, shows it to be rightly placed near the irons of Arva and Sarepta. 

 Almost every band of kamacite, 1"5 to 3 millimetres across, carries a bar 

 of porous schreibersite ; band-iron and interstitial iron are sparsely pre- 

 sent, and of a dull grey colour. Two enclosed pieces of troilite, from 

 3 to 4 mm. diameter, are surrounded by schreibersite from 1'5 to 2 mm. 

 thick, and around this is an irregular shell of beam-iron. 



1853. — Tazewell, Glaihorne Co., Tennessee.^ 



Brezina points out that in the Catalogue prepared by Tschermak * 

 this iron is indicated as Of, showing fine-ruled Widmanstiittian figures. 

 It difiers, however, very much from othev irons of this group, like that 

 from Lion River, Jewell Hill, Charlotte, &c., while it closely resembles 

 the Butler iron (see below). While, however, in the latter case the chief 

 walls of the skeleton enclose very large chambers, here they are very 

 small, so that the skeleton-character is far less mai'ked. The charac- 

 teristic of the two ii'ons of Butler and Tazewell rests mainly on the very 

 unusual smallness of the octahedral lamellae, whereby the beam-iron, or its 

 representative, almost vanishes, the irons consisting almost entirely of 

 interstitial and band-iron (and of troilite enclosed in both, and schreibersite 

 plates in Tazewell). Whether the almost infinitely thin nucleus of the 

 lamellae is identical with the ordinary beam-iron can only be decided by 

 further investigation. The appearance of traces of granular structure 

 renders it very probable. 



1873. — Ghulafinee, Cleberne Co., Alabama.^ 



The writer refers to a mass of iron which was found in 1873, and 

 supposed at the time to be a specimen of bog iron- ore. It was taken to a 



1 A. Brezina, Sitzher. Akad. Wiss. 1880, Ixxxii. Oct.-Heft. 



= Mmeralog. Mitth. for 1872, 165. 



' A. Brezina, Sitzbcr. Akad. Wiss. 1880, Ixxxii. Oct.-Heft. 



^ Miwralor). Mitth. for 1872, 165. 



» W. E. Hidden, Amer. Jovr. Sc. 1880, xix. 370. 



