Show perfected gold separator but we are now authorized to announce that arnold buffum has made discoveries of scientific bifi principles in the action of fluids in whirlpools li different from the theory of all professional siona I 1 s scientific writers on the suba subject act by which with a very simple mechanical arrangement in one cistern he gives to golden sand a thorough washing and then passes it in contact with quicksilver over such a distance as insures an amalgam and saving of all the gold philp the heaviest sulphur ets and pyrites and all sands are washed clean away this arrangement consists of a cistern with an irregular spiral passageway passage way on ake bottom plate commencing at the periphery and ending at the centre with a discharge aperture surrounded by a conical ring at the centre of the cistern bottom suspended in the cistern immediately above the spiral passageway passage way is a horizontally zon tally revolving table making a div division i ion between the upper and lower part of chrs the cistern excepting a small space around the periphery of the table in practical operation the bottom of the cistern is covered with quicksilver a stream of water and golden sand are poured in at the top ot of the cistern the horizontally revolving table give gives a to the water a rapid whirlpool motion the agitation of the whirlpool I above the table corn com mingles the ore with the water and washes away all impurities from the surface of the gold before it reaches a contact with the quicksilver the circular motion of the whirlpool below the table keeps the sand in a floating position and circulates it in the channels which form the passageway passage way the centripetal motion of the water which rests upon the quicksilver carries the sand spirally to the discharge aperture apet ture at the centre of the cistern bottom where it passes away leaving the gold all absorbed by the flickering counter motion of the whirlpool in the quicksilver the cisterns vary from ten to twenty four inches in diameter being altogether very light compact and portable and adapted to gold mining of every description in all ali places they are exhibited in operation washing gold every day at the gold mining depot no 8 battery place new york the patent bears date the day of october 1851 the practical desulis of the machine have won for it the appellation of Buff urns perfected gold separator |