356 Analysis of Meteoric Iron from Tennessee. 
The undissolved matter from both the analyses was examined 
by the microscope. It was principally in soft black grains, along 
with which were a few brilliant scales of graphite. Both the 
grains and the scales were attracted by the magnet. On grind- 
ing them in a mortar, they gave a brown powder, in which little 
particles of metallic iron were felt beneath the pestle.. The pow- 
der was then treated with nitro-hydrochloric acid, whereby the 
iron was dissolved out, leaving behind a fine, blackish brown 
powder. 
Il. Fifty grains of the meteoric iron were now subjected to 
the following analysis. Distilled water was boiled upon the 
iron fora few minutes. A portion of the fluid, separated from 
the iron, gave with nitrate of silver no precipitate :* another por- 
tion gave with chloride of barium a slight precipitate. The iron 
was then treated with nitro-hydrochloric acid. ‘The action of 
the acid ceased after a few hours, numerous flakes of the iron 
remaining in the flask, as if insoluble.. On the application of heat 
however, the action was renewed. More acid was subsequently 
added, and the digestion continued, until the solution was appa- 
rently at-an end. The black grains and shining scales were 
separated, washed, dried, and rubbed in a mortar as above. The 
blackish brown costlier (having metallic iron intermixed) was 
treated with hydrochloric acid: a brisk effervescence from the 
evolution of hydrogen, immediately ensued. When the action 
had ceased, the fluid was decanted, and the residuary, blackish 
brown powder transferred to a small platina capsule, in which it 
was ignited for a few moments with exposure to the air, in order 
to burn off the free carbon. It was then ignited to low redness 
with twice its weight of nitrate of potassa. Water was boiled 
on the fused mass: a portion of the blackish powder still remain- 
ed. The solution was colorless, showing the absence of chro- 
mium. Nitrate of silver produced in it a pale, yellowish precipi- 
tate of phosphate of silver. The residuary brown powder was — 
now ignited for several minutes with dry carbonate of potassa; ~ 
water was boiled upon the same; the solution was decom 
by n = Eid, and then evaporated to adcynee after which the 
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tina the mass in his possessio 
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