4 . 
: 
J. LL. Smith—Concretions in Meteoric Irons. 417 
Art. XLII.—On the Peculiar Concretions occurring in Meteoric 
frons ; by J. Lawrence Smita, Louisville, Ky. 
_ BOR some time after meteorites, either stony or iron, became 
special objects of interest, little attention, comparatively, was 
Z1ven to their chemical and mineralogical constitution, and it 
1s not much over forty years that good and reliable information 
On these points has been furnished. Much of the work that 
has been done deserves to be repeated by our improved 
methods as regards both their mineralogy and chemical con- 
Stitution. This study is necessary in order to guide us in 
the future to some correct view of their lithological position 
€. 
e 
developed by the sections of them that have been thus far 
made. Notably among this class is the Dickson County iron, 
that was seen to fall in 18385. Whether this would hold good, 
is not known that can be placed in the same category. 
ut the presence of concretions is the general rule. 
re these concretions? Those which first attracted 
Ss. 
he second kind of concretion noted is of a brighter yellow 
color than the last, with which it was long confounded, until 
artsch pointed out that it consisted essentially of phosphorus 
and iron; it is seen in a very marked manner in the Lockport, 
Oluca, Tazewell and many other irons. 
A third concretion, of a dull black color, frequently more or 
less mixed with the sulphuret, was found to be a form of 
graphite, as in the Sevier and Toluca irons. 
A fourth concretion, found by me in two different irons, 
was in small parcels and consisted of protochloride of iron. 
Am. Jour. Sc1.—Tutrp Sprnms, Vou. XXV, No. 150.—Juns, 1883. 
28 
