After all the gold has dissolved, and the liquid assumes a deep red color, the solution should be allowed to cool, being stirred nearly all the time.

This salt is of a reddish-brown color.

It is rarely we find in our market good chloride of gold, as common, salt is used for the bulk; and when the bottles are labelled "15 grains," "20 grains," nine-tenths do not in reality contain exceeding five grains of chloride of gold.
The salt is mixed with the above solution when it is cooling, and gives bright yellow crystals, which some of our uninformed operators conceive to be the best quality.
Chloride of Silver .-- (Oxide of Silver.)--Take any quantity of silver coin or other silver, roll or hammer it thin; cut in small pieces.
This in order to save time.

Put the silver in a glass or earthen vessel (Florence flask is best); pour in nitric acid and water, about three parts of the former to one of the latter.

The operation of cutting up the silver may be facilitated by applying a gentle heat.
This blue solution consists of oxide of silver and oxide of copper, both combined with nitric acid.