Ferric adj. Pertaining to, derived from, or containing iron. Specifically (Chem.), denoting those compounds in which iron has a higher valence than in the ferrous compounds; as, ferric oxide; ferric acid.
Ferric acid (Chem.), an acid, H2FeO4, which is not known in the free state, but forms definite salts, analogous to the chromates and sulphates.
Ferric oxide (Chem.), sesquioxide of iron, Fe2O3; hematite. See Hematite.
... containing solutions of ammonium chloride and zinc chloride can, according to the recent researches of M. Onimus, be converted into dry piles by mixing these solutions with plaster of Paris, and allowing the mixture to solidify. If mixtures of ferric oxide and manganese peroxide with plaster of Paris are employed, the electromotive force is slightly higher than with plaster of Paris alone; and when ferric oxide is used, the battery quickly regains its original strength on breaking the circuit. When the battery is exhausted, ... — Scientific American Supplement, No. 483, April 4, 1885 • Various
... patented by W. Willis, Jr., being a development of such printing. Its principle is that a solution of ferrous oxalate in neutral potassium oxalate is effective as a developer. A paper is coated with a solution of ferric oxalate and platinum salts and then exposed behind a negative. It is then floated in a hot solution of neutral potassium oxalate, when ... — Crayon Portraiture • Jerome A. Barhydt
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