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Show even the oldest and most experienced prospectors. I The greatest draw back In most cases .is that the greater number of tests are made by mall order assayers, who. no doubt, use the open scorlfier fire test, and tho vlolaiile properties of all telluric ores arc such that by that process most of the. values are lost, and the consequent results are very discouraging. to the prospector. The only reliable fire .test for vio-latlle vio-latlle ores, either telluric, antimonial or zinc, Is to make a ton assay in :i sufficiently large crucible to insert -vertically a bright clean piece of steel (a ten-penny wire nail is most con venient). and cover the crucible with a close-fitting scoiiflcv, and on takiug it from the nu filer carefully remove the nail from tho crucible, and when It cools remove the values which collect col-lect in flnc filaments, somewhat resembling re-sembling tho manner. Jn which frost will gather on a nail, weigh such deposit de-posit and add result to the button obtained ob-tained by cupellatlou, and . in most cases it lias been the writer's experience experi-ence to get much greater values from the nail and the Inside of the inverted scorifier than from the cupelled button. but-ton. The most satisfactory methods, however, how-ever, to me, have been 'by the wet or chemical process, or by cyanidlng. It takes a much larger quantity of ore Mill more labor and expense for tho latter process to make anything like an accurate determinjition. PROSPECTOR TALKS OF. - .'LA SAL. MOUNTAINS V " TT ' I Salt -Lake" City, June 29. Although little -is heard of the La Sal mountain moun-tain district in Grand county, A. M. Rogers,- an old prospector of the district, dis-trict, gives a rather glowing picturo of its Opportunities in the Grand '.Valley '.Val-ley Times. In his article Mr. Rogers says: '""- The "many' and varied mineral' re-sources re-sources of the Lai Sal mourtaJa. region re-gion are scarcely comprehended by even those who are host acquainted -ith the topographical conditions existing ex-isting there. That there are large deposits de-posits of gold and copper bearing ores, and in some places a very good grade of silver ores, has long been known, but the vast bodies of gold-bearing tellurium ores in the form of sylvanlte and calaverite and occasional pockets of petzite. very' rich in auriferous wealth, is scarcely understood by |