The Pamphlet Collection of Sir Robert Stout: Volume 2
No. 327
No. 327.
This sample was forwarded by Captain Hutton. It is hydrated sesquioxide of iron, of fair quality. It yielded:—
Water | 7 per cent. |
Sesquioxide | 55 per cent. |
Earthy matter, chiefly silica | 38 per cent. |
The silica (about 20 per cent.) would require lime for its removal. Equal to 38.5 per cent, per metal.