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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Spongy Platinum

Dissolve separately crude bichloride of platinum, and hvdrochlorate of ammonia in proof spirit; add the one solution to the other as long as a PLATINUM-ANTIMONY. precipitate falls; this is collected, and, while still moist, formed into little balls or pieces, which are then dried, and gradually heated to redness.

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