Bisbee daily review., 1903-05-07
IN THE MINING FIELD Operations of Interest Throughout the County of CoChise, Arizona
 
and Sonora

ground in the Kearsage mines should bring the average for the entire Os- ceola Consolidated up to nearly 25 pounds of ingot copper per ton of rock crushed.
 The work of remodeling the Adven- ture mill has been completed. and both mine and mill are running smoothly, and with much better results than were indicated by the decidedly dis appointing returns secured when the mill went into commission.
 The assessment of one dollar per share on Phoenix was expected by To- cal shareholders. Repeated delays in the receipts of machinery and struct- urai material have set back the date of beginning production, which will probably be about July next The underground conditions at the mine are very satisfactory.
 The Champion mine is now supply ing about 1900 tons of rock daily to the mill It is apparent that the mill ing facilities planned for the mine are far below the possible productive ca- pacity of the mine, and a second mill must be built-the sooner the better. The Champion is such a rich and large mine that the major portion of it's net earnings for several years may be re- quired to increase it's mining and mil ling 5acilities-but at the end of that time, with a productive capacity of about 100000 pounds yearly, the Champion will take its proper rank among the greatest producers of the globe.
 The Coper Grown Mining company, which is reopening the old Hamilton mine, west of the Ontonagon river, is driving a tunnel and sinking a shaft simultaneously The Hamilton has always been spoken of by those con- versant with the property as making good showing in copper for the linn ited amount of work done on it. The present owners seem to have faith in the mine, and are setting about their work intelligently.
 The Winona continues to furnish slightly better than 200 tons of rock daily to the stamp operated in the Atlantic mill, and secures good min eral returns therefrom The mine could readily furnish more rock if the shaft were supplied with a rock-house and other facilities required for eco nomical production upon a considera- ble scale.
 The Franklyn mine is now making money, on a 15-cent copper market, and given continuation of present prices for a year or two will work into very good shape financially and physically. The Franklin has made a salant fight to continue its corporate existence in the face of the rapidly approaching exhaustion of it's original mine, and the bulk of it's production is now being secured. and secured at an actual profit, from the Junior mine, a property thoroughly discredited by two previous failures, in which consid, erably more than a million dollars were lost
 As is practically always the case in new districts, the milling processes first used by Lake copper mines were inefficient, costly and wasteful Ibis l work of improvement is still in pro- gress, and as consequence, the tail l ings from Lake mills never carried so little copper as now. Experimental l plants for working old tailings are | now operating on the sands of the old | Franklin and Central mills. and more l or less experimental work Is under way at other points As there are hundreds of thousands of tons of cop | per in the old tailings of Lake mills. ] the successful reworking of the sands, certain to come sooner or later. Is a 1 matter of no small importance. h. yentor5' and scientists are also at work. as they have been for thirty years past, on sundry processes cal culated to save the values carried in the cupriferous sandstones of the up- per Keweenawan series. There are several properties on these beds, in the Porcupine Mountains. Ontonagon county, which carry high per centages. but are now valuless because the cop per is so exceedingly fine as to defy ordinary processes of mining and con centration