Mix a little nitric acid with half the quantity of muriatic acid, into
which put the metal for solution.
Or, pour a little aqueous solution of chlorine into a small glass,
and put in a bit of pure gold leaf; stir it with a glass rod, and the
gold will dissolve. Thus gold, which cannot be dissolved in nitric,
sulphuric, or other strong acids, will quickly disappear in water, with
a little chlorine in solution.