Test for Gold
Strong Nitric Acid (36°), 39 parts.
Muriatic Acid, 1 part.
Water, 20 parts.
Test for Silver
24 grains Nitre of Silver.
30 drops Nitric Acid.
1 ounce Water.
The above tests should be taken in conjunction with Diameter, Thickness, and Weight, the tests used at the Mint.