204 C. U. Shepard on Meteorites. 
Sb Zn* and Sb Zn? could not be explained by this principle; 
meric constituent, and the degree of allomerism varying from 
to 7 per cent. It is unnecessary, however, to — exall 
ples, as the above are sufficient to illustrate the use of the 2 
ened 
Arr, XIX.—Notices of several American Meteorites ; by 
CHARLES UPHAM SHEPARD. 
1. Nebraska Iron—This very interesting mass, first noticed i : 
alate number of the Proceedings of the St. Louis Academy 
Sciences, was brought to St. Louis by the fur traders 1n the oo 
ploy of C. P. Chouteau, Esq., about two years ago, and b : 
presented to the museum of the Academy. It was foun ar’ 
the Missouri River, between Council Bluff and Fort Unio 
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