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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Preservation of Photographs

II. Cooper, Jr., of England, gives the following formula for a preservative varnish which is stated to be an entire protection against fading: 1 drachm gum damar dissolved in 1 ounce benzole. 1 drachm paraffine, dissolved in 1 ounce benzole. Mix 4 parts of the paraffine solution with 1 part of the damar solution. Photographic prints covered with this varnish are impermeable to water. A solution of the paraffine only will do; but it is better with the gum damar.

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