521 
Cast Iron, Steel, and Malleable Iron, 
Or to calculate it centesimallv, 
1-0090 
0*0606 
0*2412 
0*0000 
0*0000 
0*0000 
1*3820 
3*1848 
1*1050 
0-7202 
1*9100 
r 62-7282 
\ 27*5566 
00*1023 
100*0000 
I only state here briefly, that in order to separate chromium, 
iron, phosphorus and alumina, I proceeded in the usual way, 
— by melting the first-dissolved and evaporated quantity of 
iron to be analysed with carbonate of soda in a platinum cru- 
cible, and dissolving the fused mass in distilled water. The 
solution contained the phosphoric acid, the chromium, and a 
little alumina and silica ; the remainder was oxide of iron, 
silica and alumina, and a little alkali. 
The solution kept quiet for some time in a dish covered 
with paper, in order to allow the manganese to separate, was 
neutralized with nitric acid and evaporated to dryness. After 
having been moistened by nitric acid and dissolved again, the 
silica was left behind. The filtered liquor, neutralized with 
ammonia, let fall a basic phosphate of alumina. From the 
again filtered liquor, acidulated with acetic acid, acetate of 
lead precipitated phosphoric acid, sulphuric acid and chro - 
mium in combination with oxide of lead. Hydrochloric acid 
and alcohol separated the chromium from the precipitate, 
which consisted now only of phosphate of lead, sulphate of 
lead, and chloride of lead. From the solution, freed by means 
of sulphuretted hydrogen from all traces of lead, ammonia 
threw down the chromium in the state of oxide. 
We here see a new feature in white iron; the carbon of white 
coke-iron is always combined with a constituent hitherto to- 
tally overlooked, that is, azote. No white coke-iron which I 
analysed was free from it, nor any gray iron free from alumi- 
num. 
Tne best English cast steel as well as ^iSoootz and malleable 
iron, possesses the same property of being combined with azote. 
Now as malleable iron produced from gray pig iron contains 
Aluminum. 
Manganese 
Arsenic 
Antimony . 
Tin . . . 
Chromium 
Phosphorus 
Sulphur . 
Azote . . 
Carbon . . 
Iron . . . 
Loss . . 
