Cast Steel 
373 
Grains* 
Weight of the iron 922, charcoal 46, = - 968 
Metal resulting - 950 
Total loss of weight 18 
Exp. IXo Swedish bar iron - - 1330 
Charcoal ~th part, or 53 grs. 
From this mixture a perfect fusion and metallic 
button was obtained, w r hich weighed - 1351 
Gained in weight by the combination of carbon 21 
equal to ~d part the weight of the iron. In this experi- 
ment also the charcoal had completely disappeared. The 
upper surface of the button was smooth, the under surface 
considerably pitted. The concaves chequered with a rude 
crystallization peculiar to cast iron. The fracture of this 
metallic mass was bright silvery white, destitute of grain, 
and exhibiting a very perfect streaky crystallization slight- 
ly radiated. Its resemblance was strikingly similar to 
that of highly blown cast iron prepared in the finery for 
the purposes of bar iron making ; an operation common- 
ly in use for the purpose of decarbonating the iron, that 
it may, in the subsequent process, sooner pass into the 
state of malleability. The weight of iron and charcoal in 
the experiment amounted to grs. 1383 
Iron obtained - - 1351 
Total loss in the fusion 32 
Exp. X. Swedish iron - - 1348 
Charcoal -g^th, or 45 grs. 
From this proportion of mixture in half an hour 
a perfectly fused button of metal was obtained, 
which was found to weigh - - 1359 
Gained in weight by the combination of carbon 
3 B 
11 
