Important: Safety Warning
This page contains a formula or preparation using substances now known to be dangerously toxic, such as arsenic, mercury, lead, or cyanide compounds. Exposure to these substances can cause severe poisoning, permanent injury, or death.
In addition, this page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes.
This information has been left in for historical purposes but should not be acted upon.
Electro-Gilding
To Recover Silver from Old present
This method requires only the fol- Plated Goods. Oil of vitriol, together with lowing precautions: The metallic surface 5 per cent. of…
Process of Electro-Gilding
The process of gilding is generally performed upon silver articles. The method of proceeduntil it is convenient to immerse them in the very…
To Prepare Cyanide of Gold
Dissolve 1 ounce of fine gold in 28 pennyweights nitric acid and 2 ounces muriatic acid, and add 1 quart hot water. Precipitate with the…
To Prepare a Solution of Gold
Dissolve 4 troy ounces cyanide of potassium and 1 ounce cyanide of gold in 1 gallon rain or distilled water. This solution is to be used at…