J. Lawrence Smith on Meteorites. 159 
the operation can be carried on in a small platinum capsule. This 
reaction can also be had by acting on the mineral, however small 
the piece, by aqua-regia, evaporate until only a little of the liquid 
is left, add a little tartaric acid, then a drop or two of ammonia 
to supersaturate the acid, and lastly a little ammoniacal sulphate 
of magnesia, when the crystals of the double phosphate of mag- 
nesia and ammonia will appear 
strong evidence of its being an original constituent of the mass, 
and not formed since the fall of the mass. Chlorid of iron was 
apparent on various parts of the iron by its deliquescence on the 
surf 
tlace. 
2. Meteoric Iron from Campbell County, Tenn. 
This meteorite was discovered in July, 1853, in Campbell 
County, Tennessee, in Stinking Creek, which flows down one 
of the narrow valleys of the Cumberland mountains. It was 
found by a Mr. Arnold in the channel of this stream, and having 
been obtained by Prof. Mitchell of Knoxville, he kindly pre- 
Sented it to me. It is a small oval mass 24 inches long, 12 broad, 
and ? thick, with an irregular surface and several cavities perfo- 
The iron composing the mass was quite tough, highly crys- 
talline, and exhibited small cavities on being broken, resembling 
very much in this respect, as well as in many other points, the 
ttommony Creek iron; a polished surface when etched, exhib- 
ited distinct irregular Widmannstattian figures. 
The weight is 4 ounces. Specific gravity, 7-05. The low- 
hess of the specific gravity is accounted for by its porous nature. 
Composition— : 
Tro) 
n, . e ° . . . 97-54 
Nickel, § , : ti ae ee 
Cobalt, . : : nd 
Copper, too small to be estimated. _ 
Carbon ‘ : : : ae 
somhones, 2 ‘ ‘ ; . ee 
Ca, > i . . . . . . 
100752 
Chlorine exists in some parts in minute proportion. The 
amount of nickel, it will be seen is quite small, but its composi- 
ton is nevertheless perfectly characteristic of its origin. 
