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Typo: A Monthly Newspaper and Literary Review, Volume 4

Iridescent Paper.—

Iridescent Paper.—

Boil in water eight parts (by weight) of nutgalls, five parts of sulphate of iron, four each of sal ammoniac and sulphate of indigo, and one-eighth part of gum arabic. Wash the paper in this decoction, and then expose it to the fumes of ammonia until the desired result is reached.