Encyclopedia of Practical Receipts and Processes

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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Protoxide of Iron

Dry protox- with recently distilled cr boiled water. This ide of iron is a black powder; in its hydrated preparation is also called hydrated peroxide of state it is white, and when exposed to the air iron. rapidly absorbs oxygen, assuming first a grey-

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