Gold Placer Mining Equipment 911 Metallurgist
Jul 10, 2017 . Such a method might, indeed, hold good if the gold were coarse and heavy; but in beaches, and, generally, in river beds, the gold, by long attrition, has been ground into fine dust .. In his Notes on Gold Dredging, 1898, Mr. J. B. Jaquet thus describes the revolving trommel or screen on a modern dredge.