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Blue Writing Fluid
Dissolve the soluble ferrocyanide of potassium and iron in pure water. Resembles No. 2478, but is precipitated from its solution by alcohol.
How to silver a mirror, brew ginger beer, kill moths, make fireworks, tan a hide, bronze iron, cure a ham and clean a straw hat: William B. Dick's numbered encyclopedia answered the questions a nineteenth-century household actually had.
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Dissolve the soluble ferrocyanide of potassium and iron in pure water. Resembles No. 2478, but is precipitated from its solution by alcohol.