from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An alloy of iron containing approximately 15 percent manganese and small quantities of carbon and silicon, used in the Bessemer process.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A ferromanganese alloy containing approximately 15% manganese and small quantities of carbon and silicon.
from the GNU version of the Collaborative International Dictionary of English
- n. See spiegel iron.
from The Century Dictionary and Cyclopedia
- n. A pig-iron containing from eight to fifteen or more per cent. of manganese.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. pig iron containing manganese; used as a deoxidizing agent and to raise the manganese content in making steel
These two elements are then restored to the iron by adding spiegeleisen (an alloy of iron, carbon and manganese).
We can of course also determine the titration for manganese in a chameleon solution with the greatest certainty by titrating a compound of manganese with an accurately estimated content of it, for instance, a spiegeleisen or ferromanganese; the test is carried out in the following way: The substance, which is to be examined for manganese, is dissolved by means of hydrochloric acid.
For a spiegeleisen not more than 1 gramme of the sample should be taken, and for a ferro-manganese 0.3 gramme.
Senegal gum, buchu leaves, lava tips for burners, magic lantern strips, spiegeleisen nut washers, butchers 'skewers and gun wads.
Manganese ores are used mainly in the manufacture of steel, the alloys spiegeleisen and ferromanganese being added to the molten steel after treatment in the Bessemer converter and open-hearth furnace in order to recarburize and purify the metal.
Manganese itself has a value for steel-making; or, rather, for the making of spiegeleisen and ferro-manganese, which are used in the Bessemer and Siemens processes.
Without entering into a complete history (for it is beyond the task which we have here assumed),  it will not be without interest to recall how, when manganese was first obtained in a pure state, that it was supposed that it would remain simply an object of curiosity in the laboratory; but when its presence was proved in spiegeleisen and when it came to be considered an essential ingredient in the best German and English works for cutlery steel (where it is thrown into the crucible as the peroxide), then we find that its qualities become better and better appreciated; and it is surprising that no technologist ever devoted his attention to the production of manganese alloys.