324 ' "^" ^^^ different Proporlions of Carbon 



Grs. Grf. 

 Brought over 273^- 109^^ 

 The fufion of this mixture was effeAed in fifty 

 ;ninules. When cohi, the crucible was found 

 .entire, and containing of charcoal not taken up 90^ 



Loft in the fufion ^83 

 equal to 67 per cent, of the original weight of char- 

 coal. A fine button of fupercarbonatcd crude iron 

 was found, which weighed - - "li43 



Gained in weight by combination of charcoal 50 



■ equal nearly to ^i^d part the weight of the iron employed. 



The frafture of this button was inferior in point of luitre and 



prominency of crydal. It was, however, fimilar to the ulual 



run of the No. I. iron of the manufatSlurer. 



The quantity of charcoal which difappeared in this experi- 

 ment was equal to ,' th part the weight of the iron. Grains. 

 The aggregate of the mixture weighed 13^*^' 



Charcoal remaining 90^ grains. 

 Iron obtained - 1143 grains. '^'^33'. 



Loft in w'eight upon the whole 133 

 JS.v^. III. Swedifli iron in pieces - - 11 43 



Charcoal ^th, or - grs^ 190 



This mixture was fufed in thirty minutes, and 

 was allowed to cool to a low red heat before it 

 was. removed from the furnace. When cold, 

 ■the crucible was found without cracks, and the 

 ^jharcoal not taken up weighed - - ^^'i 



■-.'. Charcoal difappeared, equal to 71 per cent. 135 

 -The metallic button now obtained was fuperbiy car- 

 bonated (p astojefemble a mafs of carburet of iron, 

 it weighed - - - - 1193 



Original weight of the iron - ~ iM3 



Gained by combination of charcoal 50 

 -equal nearly to ^Vd part the weight of the iron. All the fur- 

 face prefented by this button was uniformly covered with a 

 rich and luilrous coatine of carburet, indicating a iuperior 

 quality of crude iron. Tlie quantity of charcoal which dif- 



"appeared on this fufion was equal to -^ part the weight of 



ihe iron empdoved. 



