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Show LEAD AND SILVR SMELTING. ' Under f rii-i headin;; the San Fran-ctwo Fran-ctwo r.'d't 'in b-i.i a lentliy article on thfi -iiii:li.in'r works of that ci'y, own";'! r.y Mayor S.-lhy, which i.-i worth notice. The LM-l'n t-aj-i Th WWim'!! fil.T"o for smeltinz orcH would hee.it to he at the mines from which they am extri-'fci; bur .n they can he more ai!vant;i?eou-ly worked when cienc, skilled lil.or and cipit d ar! conei ntiatr-l, ns at the e-biiiri ci'i'os, the rfc:ir('it an4 inrtt n'.iihj.lo !ce;4.ity 'u U'i'louhteJiy iian Frnii'-i-C'i. . Thiri i i ilirectc'l particularly, to Xe-7.vln Xe-7.vln an. Uluh, ami is a very Well put plea in favor of the Bay city. TTie article then pnes into a statement of the advantage ofTerol by San Fran-cifu, Fran-cifu, il,oin wIjitm the orei eome from an'l a ilc-eription of the process of reduction. Oies are shipped to the Mii'-him.' works in that city from Neva-la, l.'tah, New Mexico, Arizona, Mexico tui'l a!o:;' the Colorado river, the ni.M valuablu being brought from Aiiona. The pi iicen of reduction is thus briefly ibja ibcd : . The ore, landed at the wharf, is brought by rail into the works where it is crushed, sampled and prepared for cil'-ininir ; thence it poes to the blast furnace to be sim-ltcd ; tlienco to the r fining furnaces, where it is cleared of its ba-e matter; thence to the desilver-log desilver-log turnaci:. which separate the silver from the lead. Here it ''splits" and takes two directions the lead foing to the rcftu i n lt furnace !itaiii, where it is converted into market lead, is stamped with the proprietor's name, and . is piled -away rendy for shipment. Tho rrfsiduo from the desilvering furnace K'ocs back to the smelting aud thence to tho cupel furnace, where the small peicentage of, lead .-till remaining is extracted, leaving the silver pure, or nearly so. 'I bis is melted again in crucibles, cru-cibles, to still further refine it; for al thoUL'h it i mes from the cupel furnace -liKi.) tine, which is suitable for the pinpoes of (he mint, it is not fine enoiiLli for shipment to China, where the standard required is 9'JC-IOOO. The perfo.'tion to which this art irniv be brought is shown in one lot of 10 000 ounces, which assayed nine hundred aud ninoty-niito and three-tenths one thousandths fine. The BMtin says that Mr. Selby been so successful in his operations that he has. effectually stopped the importation of lead to the FaeiCe coast, and will this year ship east from 1 200 to 1,500 tons of pig lead,1 whilo his works yield $'i0,000 of. silver per month extracted from the lead. Of the liD.OOO tons of lead annually used in tho United States less thau 20,000 tons are produced in this country, leaving over one-third to be imported from foreign countries, showing that there is a market iu tha United .States for a much, larger quantity than is yet obtained.! Tho .conclusions drawn arc urged as au incentive to stimulate miners to make larger shipments of galena ores to San Francisco the importance im-portance and value of lead being demonstrated. de-monstrated. Still, we hold to the remaik of the Bulhtni. made near the commencement of its article, that ''The legitimate place for smelting' ores would seem to be at the mines from which they are extracted;" and conclude that if it pays Mayor Selby of San Francisco, and Balbae & Co., of Newark, New Jersey so well to buy ores that are shipped to either firm from Utah, it will pay men. of eapi al here to reduce the ores at or near the mines, and ship the bullion instead ,of the rough ore. ' - |