(under subclass 12.1) Methods and apparatus in which amalgamation, either so-called plate amalgamation in which values adhere to mercury coated surfaces, or liquid amalgamation in which values sink in a body of mercury or equivalent, sifting, and stratifying are employed to extract metallic values.
SEE OR SEARCH THIS CLASS, SUBCLASS:
13, 19 and 44, for a combination including sifting and stratifying.
41, for a combination including mercurial adhesion and mercurial suspension.
42, for a combination including mercurial adhesion or suspension and sifting.
43, for a combination including mercurial adhesion or suspension and stratifying.
