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  • noun Plural form of ferrocyanide.


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  • Treated finished paper with ferric-oxide salts and with ferrocyanides insoluble in water but soluble in acids.

    Forty Centuries of Ink 1904

  • Soluble ferrocyanides, ferricyanides, and sulphocyanides of various metals, by forming dibasic salts with potassium, sodium, or ammonium, in conjunction with vegetable, animal, or metallic coloring matters.

    Forty Centuries of Ink 1904

  • If _iron_ is present it must be removed, since ferrous salts use up much cyanide, forming ferrocyanides, and ferric salts yield ferric hydrate, which obscures the end reaction.

    A Text-book of Assaying: For the Use of Those Connected with Mines. Cornelius Beringer 1886


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