Gold-saving Apparatus in Nevada.

Cromwell Argus, Volume I, Issue 40, 17 August 1870, Page 7

Gold-saving Apparatus in Nevada.

(San Francisco Bulletin.) There are two recent inventions being tried in Grass Valley, with the end in view to still better save the gold from tha tailings which run oil' from the stamps of the null. One of these we witnessed in operation at Perrin's mill, on Wolf Creek. This invention consists of an application of the grist mill to quartz tailings. The stones are of common granite, the upper one revolving just as in a Hour-mill. AT. Chabrol is the inventor. Wet tailings are .poured into the hole in the middle of the stone and discharged after being liuely pulverised—indeed, they are reduced to almost an impalpable powder. M. Chabrol's machine at Perrin's mill grinds 20 tons iu 24 hours, and does its work well. The wear of the granite used amounts to an expense of about one dollar per day. We have no figures, as yet, of the value of the gold saved by this grinding process, but we learn that the remuneration is unexpectedly large. Iu the case of the machinery iii question,, the millings are ground after the sulphurets have been separated, or, in other words, it is at work on tha sand which is ordinarily allowed to run into the creek. Another grinder of a very different kind is at work on the east por fcion of the town, on sand which came down Wolf Creek. This s.md is made liner, and is then run over amalgamating machinery. The results so far have been good. These simple machines demonstrate that a largo amount of gold has been allowed heretofore to run off with the waters of the creek, to bo finally deposited 'in the rivers and valleys below.