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Webster 1913 Edition
Spiegel iron
Spie′gel iˊron
.[G.
spiegel
mirror + E. iron
.] (Metal.)
A fusible white cast iron containing a large amount of carbon (from three and a half to six per cent) and some manganese. When the manganese reaches twenty-five per cent and upwards it has a granular structure, and constitutes the alloy ferro manganese, largely used in the manufacture of Bessemer steel. Called also
specular pig iron
, spiegel
, and spiegeleisen
.