Weekly Arizona journal-miner., 1908-08-05
MEANS MILLIONS FOR
 LOW GRADE HOLDERS

GOLDFIELD, July 2s.-A discovery l of vastly greater importance than the finding of gold in Goldfcld or the un. carihing of fabulous mountains of high grade, is announced by Manager Mackenzie of the Consolidated Mines Company. through the discovery of n method of treating sulphidc ores that insures the extraction of g9 per cent of their precious contents without having to roast the ores. The latter form of treatment is used today all over the world, and no later than last week one of the greatest mill experts of the country predicted that the Gold. field mills would be failures. owing to the fact that the management had not made any provision for roasting the ores.
 Manager Mackenzie does not at tempt to conceal the process, which is protected by patent, but takes pride in telling the results of the experiments that were conducted before the process was fully determined.
 By means of this discovery ore run. ming as low as a a ton can be handled at profit Every mine can treat it's own ore, and every miner with little capital can install a plant that will render him independent of smelters and railroads. The find is little short of the transmutation of base metals to gold, as it brings into the market tens of thousands of tons of rock that would be otherwise worthless. It is estimated that the process will net the Consoli dated alone a profit of $12,000 day, or over $I.000,0O0 per annum, for this single company. When the same prin ciple is applied Co the mines of the world it opens up vista of wonderful possibilities.
 Miners to Reap Benefit.
 II is one of the discoveries that will revolntionize the treatment of refrac. tory ores, and thousands of mines con taining fair values, but of a refractory nature, throughout the world, will reap the benefit. All over the country are mines where in evidence is refractory ore than cannot be treated by cyanid- ing or amalgamation. The cost of transportation and smelling charges preeludes the possibility of shipping to the smelters. It looks as though that condition of affairs has come to an end, and that it is no longer necessary to depend on railways and smelters for the conversion of gold into bullion right at the mine.
 | Ever since !. II. Mackenzie took charge of the Consolidated he has been conducting experiments, with the cb- ject in view of finding out if there was not some way to treat sulphides by the acid process. He engaged the best metallurgists in the country, and for months laboratory tests were carried on at the Combination mill by A. C.. Hutchinson. It was found that fifty. pound lots yielded to the treatment in such a manner that surprised all those who were in on the secret. Last week the old Kincaid mill was equipped for more extensive tests of concentrates. This has been going on for ten days at the rate of ten tons a day. The big plant under the secret process turned out a greater success than the labora. tory tests.
 Solution of Four Hours.
 | Concentrates that assay at the rate of $500 ton yielded so per cent of the assay value after having been in the solution for four hours. This was on stun that was not supposed to be amenable to treatment by cyaniding. The other $60 in the ore will not be | bSts hI tHdt VIII lonS Ter treatment, and Superintendent Hutchinson is of the belief that the tailings will not assay better than $l. The process is as cheap as the ordin. ary cyaniding on oxide ore.
 Application for q patent on the pro. cess was filed nearly month ago, and until that is secured those connected with the discovery are keeping quiet about the details. The men who have made application for this patent are experienced mining and mill men who have conducted their tests in such an elaborate and careful way that they cannot be mistaken.
 The new process is a wonderful step in the forward movement of metal. lurgy, and especially in the treatment of refractory ores without roasting. As one of experience both in mining and gold extraction said, 'the world is ours, and the greatest discovery that has been made in Goldfeld is one that will be known throughout the globe in | n very short tina -