Warm six ounces of pure rain water, and dissolve in it 2 ounces of
cyanide of potassium, then add a 1/4 ounce oxide of gold; the
solution will at first be yellowish, but will soon subside to white;
then half fill a bottle with whiting, fill it up with this solution
and shake it well; you may now take a piece of old cotton, wet it
with the solution, rub it well over brass, copper, &c., and it is
nicely washed with gold.


11. SILVER PLATING FLUID

Dissolve one ounce of nitrate of silver, in crystal, in 12 ounces
of soft water; then dissolve in the water two ounces of cyanuret of
potash; shake the whole together and let it stand until it becomes
clear. Have ready some 1/2 ounce vials, and fill them half full
of whiting, then fill up the bottles and it is ready for use. The
whiting does not increase the coating powder--it only helps to
clear the articles and save the silver fluid by half filling the
bottles. The above quantity of materials will cost about $1.62c.,
so that the fluid will be about 3 cents a bottle. It is used in
the same way as the gold plating fluid.


12. QUICKSILVER PLATING FLUID

Take of quicksilver one ounce, one ounce nitric acid, one ten
cent piece, rain water 1/2 pint to a pint, put the three first
articles into a tumbler together; let them stand until dissolved,
occasionally stirring, then add the water, and it is ready for use.