hvhich conjiiiute Crude Iron and Steel, 145 



Exp. XIII. Swedifh iron - - 1363 



Charcoal ^th, or 15 grs. 

 A very fine fufion was produced from the expofure of 

 this mixture. The metallic button was found to weigh 13 19 



Loft in fufion, equal to — -th part, 43 



This button prefented a wavy cryftallized furface. The under 

 furface was rough, and contained one large pit accurately 

 cryftallized. The fracture was regularly granulated, final!, 

 but diftinc~r, of a light blueifh colour. The cryftals, though 

 diftin£t, were not fo prominent as thofe of eafy drawing caft 

 fteel. It, however, hammered with the ufual degree of cau- 

 tion neceflary to the working of caft fteel. The bar of fteel 

 formed from the button pofieffed all thofe properties requifite 

 for file making, and other purpofes requiring a quality highly 

 charged with carbonaceous matter. Grains. 



Weight of the mixture - - 1377 



Steel obtained - - - I 3 I 9 



Lofs of weight in this experiment 58 



Exp. XIV. Swedifh iron - - 1373 



Charcoal T i c thj or 14 grs. 

 The button obtained weighed - - J313 



Loft in the fufion 60 



equal to — g-th part the original weight of the iron. The 



furface of this button was fmooth, without cryftallization, 

 The under furface rough, and pofleffed of one large pit in the 

 centre, faintly marked with the ufual cryftalline appearance* 

 The fracture prefented regular light blue grains, difUn&, and 

 more prominent than No. XIII. One-half of the button 

 was drawrv into a neat fquare bar, and proved fteel cf an ex- 

 cellent quality. One end of the bar being loofe and (haled, 

 welded tolerably well, and hardened afterwards with a low 

 heat. ' In appreciating the quality of this refult, it ap- 

 peared to be that kind of fteel fuitable for penknives, razors, 

 &c, poffeffed of neither the extremes of hardnefs nor of 

 foftnefs. 



Beyond the proportion of T - 6 - c ih part of charcoal to iron, 

 I continued the experiment till the proportion was reduced 

 to Tic l h P art - It would appear tedious to detail thefe expe- 

 riments, the moft interefting being already minutely de- 

 fcribed. In the fame progreffive manner, by diminifhing 



the 



