Arizona silver belt., 1899-10-05


 of heat and cold, makes it more agree able for one doing business near the roof.
 The l,ansvaal, <. A., gold is worth $ls.40 per ounce, The production of the Rand district for the first seven months.of 1899 aggregated S55, ,07o,437 England wants that country and will ultimately absorb it. It means from the Cape to Cairo" and is inevitable.
 The cement made by the Jesuit padres. who established missions in California more than l20 years ago, has never been surpassed in quality by the product of modern time, Por- tions of some of the old aqueducts made over century ago are still in fair state of preservation.
 Sulphide copper ores may be roasted in heaps out of doors. the copper be- coming sulphate. This is washed out with water and the metallic copper precipitated on old scrap iron. The copper in waters coming from mines is in the form of sulphate and may be precipitated in this manner,
 Tetradymite consists principally of bismuth and tellurium, and sometimes contains sulphur. It carries from B to IS per cent of tellurum. and from 50 to 6l per cent bismuth. IL occurs with native gold in foliated scales. and in laminations with gold, chalcopyrite magnetic and limonite.
 I'ulverized iron ore has been sue oessfully reduced by mixing with coke dust and smelting in reverberatory furnaces When the surface of the layer of ore becomes red hot it is gath cred in balls, called blooms These are placed in machine called a squeezer and compressed to solid masses of iron.
 There can be no reason positively assigned for the segregation of min erals of various kinds to different DOT tions of a vein. \ theory advanced is that these minerals were deposited at different times. and that the ascending waters from which the minerals found deposited in the veins were derived, at different times carried varying quantities of the several minerals. In the Black Hills of South Dakota the silicious telluride ores of the potsdam and carboniferous formations must contain at least sG.50 per ton to meet expenses when mined a,ad mliled privately; but when treated at custom works the value must reach sl0 to SIP per ton. In the Arch1an schists the free milling gold ores are mined and milled as low as sl.50 per ton
 The mines of Bingham canyon, | tah. were first worked for carbonates of lead and silver The operators quit when sulphide of lead. iron and zinc were reached. Subsequent owners took took millions from the sulphide lead zone The present owners be- lieye they will take even larger amount from the sulphide copper and gold zone, which by former workers was considered valueless.
 l Where statement is made that all the subscribed capital will be applied to the purchase and development oi the property" it would probably be more conducive to mutual satisfaction were information vouchsafed as to the proportion ofsuch expenditure. While correct as a general statement, yet if | 99 of the amount were applied to the purchase. the result might not be wholly satisfactory to the investors | Propylite is rock which has been recognized as a distict species by sev' erai writers ofnote. among them Iirke and Stache. Later microscopic inves 1 tigation has resulted in the general opinion that propylite is altered horn. blende andesite. in which the horn, blende material has penetrated the :, feldspars during the process of alter ation, and the hornblende crystals arc found altered to chlorite and epidote These rocks contain quartz and arc also found without it.