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Of ferromanganese and other very manganiferous substances, in which the manganese need not be determined with greater exactness than to 0.1 per cent., only 0.01 gram. is taken for a test; but of common pig, wrought iron, steel, iron ore, slags, etc., there is taken 0.5 to 1 gramme according to the supposed content of manganese and the desired exactness of the estimation.
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.
These commodities embraced coal, coke, fuel, oils, kerosene and gasoline, including bunkers, food grains, flour and meal, fodder and feeds, meats and fats, pig iron, steel billets, ship plates and structural shapes, scrap iron and scrap steel, ferromanganese, fertilizers, arms, ammunition and explosives.
He was now using ferromanganese made in Glasgow. Another alloy, consisting of 60 to 80 percent of metallic manganese was also available to him from Germany. This renewed publicity brought forth no immediate reply from Mushet, but a year later he was invited to read a paper before the British Association.
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