which conjlitute Crude Iron and Steel, 325 



Grains; 



The aggregate of mixture here weighed - 1333. 

 Charcoal not taken up 55 grains. 

 Iron obtained - 1193 grains. 1248 



Total lofj in the melting 85 

 It is worthy of remark, that the lofs of charcoal in thcfc 

 experiments, together with the general lofs in fiifion, diminirti 

 in a feries proportionate to the quantity of charcoal intro- 

 duced, hearing no perceptible relation to the quantity of iron. 

 The weight gained by the metallic buttons rcfpcilively, indi- 

 cate nearly the fame dcsrree of faturation of the carbonic prin- 

 ciple, whatever difference of appearance exifted as to exiernal 

 appearance in No. III. It therefore appeared a matter of 

 fonu; curiofity, w-nrthv of iiiveRigation, what became of the 

 extra lofs of carbon in No. T. and II. beyond that fuftained 

 in No. I. when the richeft iron was produced. 

 Charcoal difappeared No I. II. III. 



r' I III 



iuiual to - - — -— - -T — 



Gained hv iron - Averao-e — d part. 



■ 19 22 23 = 21^ ' • 



General lofs in fufion 211 133 85 Grains. 



E^p. IV. Swedifli iron - _ . 1060 



Charcoal ~^ih, or 106 grains. 



From this mixture a very perfe6l fufion was obtained, 



in which all the charcoal difappeared except about 



;- grain, compofed of fmall granules pofleffing a rich 



deep black colour. The metallic button weighed 109^ 



Gained by the combination of charcoal 33 

 equal to -,-',d part the weight of the iron employed. In addi- 

 tion to the weight of the button, the fulcs and top of the 

 crucible contained a confiderable number of minute fpheres 

 of iron poflfefiing prifmatic colours. The furface of the pre- 

 fent product was crydallizcd in radii. Tiie fradlure was that 

 of highly blown crude iron of a pale filvcry white colour, 

 marked with an impLrfe6l cryflallization. I'he quantity of 

 charcoal which difappeared in this operation was equal to 

 -,',,th part the quantity of iron at firft introduced. Gr:r.:2. 

 Tlie aggregate weight was - - 1166 



Charcoal remaining [■ grain, and iron obtained 1060 "lO'SOf 



'I'otal lofs in this fufion io<^[- 



J'Ji/f. V. Swedifli iron _ . _ 1000 



C!harcoaI ,',th, or - - 65 



This fufion was found complete after half an hour's expofure. 



X3 The 



