362 
Cast Steel. 
sides the button, some thousands of metallic globules en- 
tirely covered the sides and concave top of the crucible. 
It was found impracticable to collect them all. By esti- 
mation they appeared to be from 15 to 20 grains. The 
fracture of this button was whitish blue, clear, and possess- 
ed a lustre similar to the fracture of zinc. An approxi- 
mation to grain was visible, and, from minute compari- 
son, a very early stage of steel was indicated. 
Grains. 
The aggregate of the mixture weighed - 1066 
Button of iron 1000, globules taken at 20, » 1020 
Total loss in the fusion 
46 
1035 
Exp. VI. Swedish iron 
Charqoal x^th, or - 51- grains. 
The mixture yielded, by fusion, a metallic button 
partially crystallized, weighing - - 1032 
Lost in fusion, equal to 312th part, 3 
The charcoal had entirely disappeared. The fracture of 
this button displayed a very regular grain, similar to that 
of steel. In subjecting it to forging and other tests, it 
proved to be steel of a soft quality. Grains. 
Original weight of mixture - 10861- 
Iron obtained - - - 1032 
Total loss in fusion 
Exp. VII. Swedish iron - 
Charcoal “th part, or 35 grains, 
A very perfect fusion was obtained from this expo- 
sure, The metallic button was found beneath a co- 
vering of glass possessed of a white streaky surface, 
the mass of which was of the transparency and co- 
lour of a smoky topaz : it was found to weigh - 
1055 
1052 
Lo$t in fusion, equal to^—th part the original iron 3 
