Macathur And Forrester 1887 Cyanidation. In 1887, John Stewart MacArthur, History . get more info online. Gold cyanidation The Full Wiki The cyanide process, or cyanidation (MacArthur-Forrest Process), discovered in 1887, is the method in which copper, silver, and gold are extracted from their or. get more info online. Nhận giá. ma hur and ...