0. U. Shepard—Meteorie Iron of South Carolina.. 119 
métallique luster. The chief difference between the two con- 
sists in the thickness of the crystalline bars, which in the 
Lexington iron is nearly double that in the Bohumilitz. In 
both, their walls, or bounding sides, are alike broadly undula- 
tory or wavy; and the included spaces are filled with closely 
crowded points of rhabdite (Rose) and extremely minute lines 
of teenite (Reichenbach), crossing each other at all angles from 
to 150°, for the distinct observation of which, however, a 
lens is requisite. Instead of the usually bright edges of the 
tenite layers, as they occur within the bars, one sees only 
bright furrows or channels,—the rhabdite constituting the ele- 
vated portions of the surface, evincing its greater passivity 
under the action of the acid in the process of etching. Indeed, 
the tznite lamina, including the bars, have, from the same 
cause, been similarly depressed below the general surface, 
though not to such a degree as to conceal their glittering 
edges. Whether the degree of corrosion in these different 
constituents of the iron is referable to a difference in their 
wrappers around the amygdules of troilite; also in short veins 
and gashes that may be detected here and there on broad pol- 
ished surfaces of the iron. 
The ori ie iron shows no signs of chemical alteration by 
exposure to the air, in which respect, also, it agrees with that 
from Bohumilitz. 
The specific gravity of the entire mass was 7, that of 
a fragments, 7°405. Specific gravity of troilite, 
The analysis was made by Prof. C. U. Shepard Jr., from 
cuttings obtained in the division of the iron in such a way as 
not to include portions of the pyritic nodules. The following 
result was found: 
Tron (with traces of manganese)... --.---------- 92°416 
Nickel ___. 6°077 
ee eee 0°927 
kesolubia wiatiave 8 ee Oe ee 0°264 
99°684 
With traces of tin and phosphorus. 
New Haven, Nov. 17, 1880. 
Am. Jour. Beene Series, Vou. XXI, No. 122.—Fss., 1881. 
