Spiegeleisen
A name now generally given to the varieties of pig iron, containing from 10 to 20 per cent of manganese. When the percentage exceeds that amount it is called ferro-manganese. See FERRO-MANGANESE; MANGANESE.
Twelve hundred entries from the golden age of cast metal — how bells are founded, why brass is not bronze, what a cupola melts and a core withstands — by Simpson Bolland, the trade's great teacher.
A name now generally given to the varieties of pig iron, containing from 10 to 20 per cent of manganese. When the percentage exceeds that amount it is called ferro-manganese. See FERRO-MANGANESE; MANGANESE.