Show S BETTER bElIER VALUES IN lOWER MAMMOTH Survey Gives New Significance to Development on 2000 Level Continued Improvement of ration z of the material in the fissure which is being followed on the 2000 toot foot level of the Lower Mammoth mine was shown by assay returns received yesterday at the offices In Inthis Inthis i this city The vein material Is all al highly mineralized carrying gold all sll allver silver ver vert lead and copper and a consider considerable considerable considerable able portion of it Is of shipping grade grado although It has not yet assumed the proportions of a Lower Mammoth ore body The value of the showing was al almost almost almost most Immeasurably enhanced by the result of a mine survey which was completed a day or two ago It ha had been thought that the face of the drift was Vas nearing the contact or a point vertically underneath the ore body which Is being sloped above the 1800 foot toot level but the survey showed that the drift must be ho driven approximate approximately ly feet teet before It will reach the contact The significance of this will be un tin understood understood only when It Is known that all of the ore bodies In the upper lev levels levels els tie of that portion of the mine have made on and near noar the e contact The porphyry belt appears to LU LUhers have bave acted as a barrier beyond which the mineral solutions could not flow upon reaching that barrier they were heid up until the minerals were pre precipitated precipitated precipitated in the fissures and in cham chambers chambers bers hers In the soluble lime This theory Is borne out by the fis tie fissures fissures eures having been usually found bar barren barren barren ren at distances of feet and mt mc m e C north of the contact Finding the tia level highly St rl r on the tho so mineralized at such great distance from tram the contact Is accordingly regard regarded ed as almost positive proof that an ore body Is being entered with the chance of its making unusually large in the space between the present face of or the drift and the contact Another favor favorable favorable able table feature of the situation Is that the vein Is becoming freely charged with sulphides indicating a much heavier product with up diminution i tion of at values I |