218 Analysis of the Meteoric [ron of Louisiana. 
upon its precipitate, was separated by the filter. It present- 
ed very distinctly, a blue tinge ; which on evaporation grew 
more intense, and passed to a shade of green. 
lhe ammoniacal solution, (3.) was transferred to a pla- 
tina capsule, in which it was evaporated to dryness, and 
heated to redness for the purpose of expelling the muriate 
of ammonia. A greenish gray powder incrusted the capsule 
after its ignition. : Li Bue 
ced with its solution on paper, which failed to become visible, 
on being warmed. Cobalt was theréfore inferred, not to 
exist in the iron under examination. 
6. The muriatic solution, (5.) from its peculiar green col- 
or, and from its affording, with prussiate of potash, a green- 
ish white precipitate, was recognized as containing nickel. 
. A pa the ferruginous precipitate, (3.) was heate 
in a platina crucible along with nitrate of potash ; and to the 
residue, water was added, and the excess of potash neutral- 
ized by nitric acid. The colorless solution was not affected, 
either by the proto-nitrate of mercury, or by nitrate of silver. 
Accordingly the absence of chrome was inferred 
8. Another portion of the precipitate by ammonia, (3.) 
was dissolved in muriatic acid; and the solution, after being 
rendered neutral, was decomposed by the succinate of ammo- 
nia. The supernatant liquid, on being boiled with carbonate 
of soda, afforded no precipitate; by which, the absence of 
manganese was proved. 
Satisfied by these preliminary experiments, that the Lou- 
isiana iron was alloyed only by nickel, I proceeded as follows. 
to ascertain the proportion in which it was present. 
Analysis. 
A. 50 grs. of the meteoric iron, were dissolved as usual 
and decomposed by ammonia in excess. After a slight sim- 
tained decomposed by potash. The evaporation was con- 
tinued to dryness, in order to expel every portion of ammo- 
