374 
Cast Steel . 
equal to part the original weight of the iron. The 
upper surface of this button was smooth without confi- 
guration. Below the surface was uneven, and covered 
with minute but perfect crystallization. Its fracture was 
blueish silvery white, composed of fiat dazzling crystals, 
proceeding in lines from a centre to the edges of the but- 
ton. Here it was most obvious, that from the smallness 
of the proportion of carbon presented to the iron, the re- 
sulting product was found assuming the earliest stage of 
granulation approaching to the steely state. The brilliant 
concretions observable in the surface of the button were 
too indistinct and flat for steel capable of withstanding the 
hammer. Grains. 
The joint weight of the iron and charcoal amounted to 1393 
Iron obtained - - - - 1359 
Total loss of weight in the fusion 34 
j Exp. XI. Swedish iron - - 1502 
Charcoal ~th, or 37 grs. 
The metallic button obtained by the fusion of this 
mixture weighed - 1505 
Gained in weight by the union of carbon 3 
equal to -~th part the first weight of iron. The upper 
surface of this button was smooth, with a faint impression 
of a chequered crystallization. The under surface pos- 
sessed some large pits similarly though more perfectly 
crystallized. 
The fracture possessed one shade of blue beyond that of 
No. X. A regular granulated surface composed of flat ob- 
long crystals was observable, still too indistinct and too 
much on edge for workable steel. The weight of char- 
coal and iron in this experiment amounted to grs. 1539 
Metal obtained - - 1505 
Total loss of weight in the fusion 34 
