Cast Iron, Steely and Malleable Iron. 429 



diminished, having only lost somewhat of their brightness ; 

 the black spots sometimes disappear entirely. 



1*72 grains of the remaining gray powder, separated from 

 the filter and ignited, lost 0'203, and seemed in appearance to 

 have undergone no alteration except having become a little 

 more bulky and flocky. 



Hydrochloric acid extracted oxide of iron, 0*036. 

 1-32 grains of this residuum deprived of oxide of iron was 

 mixed with five times its weight of carbonate of soda and ig- 

 nited : after cooling, the lid of the crucible was found covered 

 with green drops of manganate of soda, and on the bottom 

 was the fluxed mass crystallized, perfectly white on the bor- 

 ders, but having in the middle a dirty yellowish spot. 

 I separated in the common way 



Silica 0-963 



Iron and Manganese 0*076 



Loss (of Carbon) 0-281 



1-320 

 The same result was obtained, when, instead of melting the 

 remaining gray powder with alkali, it was boiled in solution of 

 caustic potash and strongly concentrated ley ; the silicon is 

 taken up by the potash and iron, and manganese, mixed with 

 some carbonaceous matter, is left in blackish-green bulky 

 flocks on the filter, oxidizing very rapidly. 



35 grains of the same metal analysed in the common way 

 gave 



Silicon 1-702530 = 4.-86430 



Aluminum 0-352583 = 1-00738 



Manganese 0*262960= 0-75130 



Phosphorus .... 0-139000 = 0-54000 



Sulphur 0-062110= 0-17740 



Carbon 1-183000 = 3-38000 



Iron 31-152607 = 89-00740 



Loss 00-095210 = 0-272 22 



35-000000 loo-oooocT 



The white transparent nodules are undoubtedly silica; 

 before the lilow-pipe they melt with soda into a transparent 

 globule, separating at the same time black scales of graphite; 

 melted with microcosmic salt, a skeleton of silica is separated 

 as usual. After subtracting silica, nothing remains but a 

 small quantity of iron and manganese, and the loss as already 

 shown is = 0-281, which amounts for 35 grains of iron to 

 1-17 ; the actual quantity of carbon was, as we see, 1*183, and 

 therefore we may safely assume the loss to be carbon. The gra- 

 phite scales, freed by means of solution of caustic soda from 



