860 
Cast Steeh 
before It was removed from the furnace. Grains, 
When cold, the crucible was found without 
cracks, and the charcoal not taken up weighed 5 5 
Charcoal disappeared, equal to 7 1 per cent, 135 
The metallic button now obtained was superbly 
carbonated so as to resemble a mass of carburet 
of Iron. It weighed - * 119S 
Original weight of the iron * 1143 
Gained by combination of charcoal 50 
equal nearly to ~~d part the weight of the iron. All the 
surface presented by this button was uniformly covered 
with a rich and lustrous coating of carburet, indicating 
a superior quality of crude iron. The quantity of char- 
coal which disappeared on this fusion was equal to ~d 
/part the weight of the iron employed. 
The aggregate of mixture here weighed - 1333 
Charcoal not taken up 55 grains. 
Iron obtained - 1193 grains. 1248 
Total loss in the melting 85 
It is worthy of remark, that the loss of charcoal in these 
experiments, together with the general loss in fusion, di- 
minish, in a series proportionate to the quantity of charcoal 
introduced, bearing no perceptible relation to the quantity 
of iron. The weight gained by the metallic buttons res- 
pectively, indicate nearly the same degree of saturation of 
the carbonic principle, whatever difference of appearance 
existed as to external appearance in No. III. It there- 
fore appeared a matter of some curiosity, worthy of inves- 
tigation, what became of the extra loss of carbon in No* 
I. and II. beyond that sustained in No. L when the rich- 
est iron was produced*. 
