Young's Demonstrative Translation of Scientific Secrets by Daniel Young
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page 6 of 236 (02%)
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quantity of paste used. Grams belong to French weights, four grams
are a little more than one drachm. 7. ELECTRO SILVERING--NEW METHOD 10 grams of nitrate of silver are dissolved in 50 grams of distilled water; then 25 grams of cyanide of potassium in 50 grams of distilled water; the two liquids are mixed in a decanter, and stirred for 10 minutes; it is then filtered. Finally, 100 grams of sifted whiting are mixed with 10 grams of pulverised supertartrate of potass and one gram of mercury. This powder and dissolving liquid are used in the same manner as in the above method of gold plating. These excellent methods of silvering and gilding were discovered in June 1860, by the great French chemist Baldooshong of Paris France. It is far superior to any other method ever discovered, and will eventually take the place of all. 8. ELECTRO GOLD PLATING--USUAL METHOD Take a $2 50c. piece of gold, and put it into a mixture of 1 ounce of nitric and 4 ounces of muriatic acids, (glass vessels only are to be used in this work,) when it is all cut dissolve 1/2 an ounce of sulphate of potash in one pint of pure rain water, and mix the gold solution, stirring well; then let stand and the gold will be thrown down; then pour off the acid fluid, and wash the gold in two or three waters, or until no acid is tasted by touching the tongue to the gold. Now dissolve one ounce of cyanuret of potassium in one pint of pure rain water, to which add the gold, and it is ready to |
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