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_ Native and Meteoric Iron * 369 
The iron afforded me the following results: ¥ 
iron, - "eit ot) ar nies VengggS 
Silicon, - - ~  - - - 0.20 2 
Calcium, 9 @ a 0.09 
Aluminium, in traces - . xi 
had Yat 4 OME 
The hard and brittle ore attached to the mass, does not appear 
to differ essentially from ordinary magnetic iron ore. It contains 
traces of silicic acid and of lime. 
The source of this iron» must probably for the present, remain 
asubject of doubt. T secondary country in which it was 
found, no less than noticia configuration of the mass, would 
lead us to doubt its terrestrial origin, either as a product of nature 
orof art; while the absence of nickel in its composition, sepa- 
tates it widely from meteoric iron. Future observations may re- 
lieve it from the isolated position it now appears to hold. 
Meteorie Iron from Guilford County, North Carolina. 
In the year 1830, I gave, in Vol. xvu, p. 140, of this Journal, 
a hasty notice of two small fragments of iron from ‘North Caro- 
lina, which had been presented to the American Geological So- 
ciety, by Prof. D. Olmsted, of Yale College. Having had occa- 
sion to bestow a renewed attention to the subject recently, I find 
Thad adopted an erroneous opinion respecting the specimen from 
Guilford County. It contains both chlorine and nickel; and 
Consequently can no longer be regarded as possessed of terres- 
trial origin. : 
The structure of this iron, as developed by the recent attempt 
fo detach a few grains for analysis, reminds me forcibly of that 
*xhibited by the Buncombe, (N. C.,) meteoric iron. Like this, 
It cleaves into tetrahedral, octahedral, and rhomboidal fragments, 
tnd presents the same foliated texture, and pinchbeck tarnish. 
‘t cleaves, however, with greater difficulty than the Buncombe 
ton, 
In effecting its solution in nitro-hydrochlorie acid, I observed 
‘very slight residuum of a greyish black color. It was removed 
™ the solution, and finely pulverized in a mortar. it present- 
ed the appearance of magnetic iron, and on treating it with a con- 
“eutrated portion of the mixed acids, it entered into solution af- 
