342 Meieoric Iron from Tennessee and Alabama. 
ularly dispersed through the iron, they exhibit a regular arrange- 
ment; they are all inclined towards each other in such manner 
that if they were extended till they met at the extremities, they 
would form equilateral triangles, so that they indicate the crys- 
talline structure of the mass, which is that of octahedrons. In 
this respect it coincides with Cocke County iron.* The latter 
being more or less subject to decomposition, I was able to separate 
several of these lamin, which have almost the color and lustre 
of burnished silver, and are not yet tarnished, though they have 
been exposed for five or six years to the influence of the atmos- 
pheric air. 
There is no doubt that these pellicles or amine, though equally 
attracted by the magnet, have a different composition from other 
parts of the iron, and this seems to be the cause that the several 
analyses made of the same iron seldom give the same result. 
The polished section of my cabinet specimen, offers a surface 
of about 7 by 4: inches; it exhibits in this space two large 
heterogeneous masses, one of about + of an inch and the other 
about 2 of an inch in diameter, and others smaller. I consider 
these masses as composed principally of graphite, intimately mix- 
ed with metallic iron, as the powder which I scraped off is feebly 
attracted by the magnet, and soils paper like common plumbago, 
and its streak has a black metallic lustre. In this respect, also, it 
resembles the Cocke County iron. Upon the whole it is an inter- 
esting variety. — 
Meteoric Iron from Green County, Tenn. 
It seems that Mr. Estabrook, President of the College at Knox- 
ville, East Tennessee, learned from Mr. Francis M. Davis of 
Greenville, that a mass of some metal had been found in Green 
County, East Tennessee. Mr, Estabrook requested Mr. Davis to 
secure it for him, in order to transmit it to me. Mr. Davis’s an- 
swer, dated the 3d of July, 1842, is as follows :—“ In compliance 
with your request I have obtained the mass of metal to which 
yourefer, The whole mass that I have, weighs about 14 pounds ; 
6 or 8 pounds have been broken off. The form of the whole 
mass is very irregular, having the appearance of having been 
* See this Journal, Vol. xxxvuz1, p. 251. 
