The Journal of the Board of Arts and Manufactures for Upper Canada, April 1867
Dr. Brucke obtains soluble Prussian blue by preparing a solution of 217 parts of yellow prussiate of potash and one of sesquichloride or tersulphate of iron made of 72 parts of protosulphate, or its equivalent of metallic iron, mixing each solution before they are brought together, with twice its volume of cold saturated solution of glaubersalts. The iron liquor is then added to the prussiate, keeping them well stirred, the precipitate is washed by decantation, until the washings come off blue. It is then transferred to a strainer, and afterwards dried and pressed between paper.
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