Book-bot.com - read famous books online for free

Young's Demonstrative Translation of Scientific Secrets by Daniel Young
page 6 of 236 (02%)
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
DigitalOcean Referral Badge