Papers relating to the Fusion of Carbon. iig 
-'[he quantities of fused carbon, with which these experi- 
wents were made, were too limited, to admit of my ascertain- 
ing the ratio of the iron to the carbon; but, the proportion of 
e metal was evidently very minute, being productive only 
of a slight and partial discolouration of the platinum. 
From these experiments, it would seem, that the sub- 
stances examined, are carburets of iron. The copiousness 
of the precipitation with lime water, indicates that the nitrate 
of potash had. met with enough carbon in the fused product, 
to generate a considerable proportion of carbonic acid, which 
combined with the potash, and was afterwards yielded up to 
the lime; while the discolouration of the prussiate of potash, 
and the minuteness of residuum occasioning it, prove, that a 
] proportion of iron ieee also in he subject of exam- 
ination. 
I beg leave here to reiterate ‘the opinion advanced at. ‘the 
close of my strictures on Prof. Vanuxem’s memoir, that the 
ence of a minute portion — —_ in the projection arising 
on charcoal exposed to galvanic ignition, cannot materially 
diminish the interest excited ro the fact, tise matter, so fixed 
and infusible, should be thus mysteriously accumulated on 
one pole, at the expense of the other. 
The combustion of the fused sets of charcoal, by the 
flame of the compound blowpipe, as ntioned above, de- 
monstrates the impropriety of omy deat: secre to ob- 
aa such products, agreeably to the course pursued by Prof. 
eoememetmarasce 
Vi ent ex, ents on Chercoa, &e. 
Notice of some ree " Pee By 
LLIMAN. 
Ever since the publication. of oe apenas on this sub- 
ject in 1823, I have been anxio te the inquiry 
further, but have been aie sapoteal mee a0 hel ste by 
indi ven now, | am not prepared to pre- 
sent that full view of the subject, which is deuirable, but a 
few facts may be ae on this occasion 
I carefully prepared a sufficient quantity of the best maple 
charcoal, by selecting that which had been made from young 
