Bisbee daily review., 1906-09-09

, branch of the Superior & Pittsburg, which is also, in fact, tributary to the Cole shaft, that being the avenue through which all of the Superior & Pittsburg's shipping ore is brought to the surface.
 Calumet & Arizona As reported at the time, the Calu- met & Arizona has encountered a new body of sulphide ore running as high as 30 per cent copper, the strike be- ing in the Buckeye claim, which is tributary to the Oliver shaft. The dis closure of sulphides is at the 1,100- foot level and in the body that lies beneath the body of oxide ore en- countered at the 1,000-foot level sev- eral months ago. This disclosure of sulphides, or the primary ore deposit, beneath oxides and carbonates, which represent an altered formation due to teaching and weathering, is only the natural sequence accompanying the development of formations of that character ct depth, and has been pro- ven times innumerable in the Calu- met & Arizona and all other such mines. The carbonates and oxides cap the sulphides and are of limited depth, while the sulphides, when they are reached may be counted as virtually inexhaustible.
 The Calumet & Arizona's new body of sulphide ore in the Buckeye claim is running at present from 10 to 30 per cent metallic copper. Its extent is unknown, but the indications are first-class for a large body of ore. The workings in which the disclosure was made consist of a drift that is driving across the Buckeye claim on its short est axis. and which has now pene- | trated about half the distance across
 this tract. The other workings of the Calumet & Arizona continue unchans- ed in their favorable condition. De- velopment of new ground in the old
 ore bodies advances steadily, keeping ] the stopes opened safely ahead of the
 extraction.
 l Calumet & Arizona does not open
 extensive stoping ground ahead, but
 contents itself with say one drift
 through an ore body, and a crosscut
 here and there to determine its dimen-
 sions, until it is ready to begin the extraction of ore for shipment to the
 smelter. Then the stopes are opened up as needed. The reason for this
 policy is obvious when the soft char
 acter of the ore is considered. To
 open drifts extensively, years ahead.
 in this ground as is done in the solid
 ground of the Michigan copper coun-
 try, would involve prohibitve expense for timbering to keep them opened, : and would represent useless expense since one drift and few crosscuts. raises and winzes, furnish sufficient evidence upon which to base calcula-- : tions of an ore body in the Bisbee- mines.
 The Oliver shaft has not yet come
 into its full service as producer, and the management is not hurrying mat
 ters. The company is now outputting
 its ore on normal basis and no in-
 crease is contemplated It has ample Preserves from which to maintain this
 output indefinitely, and it's two shafts
 serve it most comfortably It is planned eventually to tram the ore from the ground tributary to the Irish Mag shaft over to the Oliver shaft and hoist through that avenue for time, giving an opportunity to make some needed repairs in the Irish Mag. But the conditions are far from crit ical and the plan will be allowed to work itself out gradually. For the present the largest part of the ore is coming up through the Irish Mag shaft and this condition may continue | for some time before the Oliver gets into full whirl. The Oliver shafts surface equipment is in a most com plete shape, with the exception of
 some needed railway trackage that
 will be required before it can furnish it's anticipated output. Its new hoist ing engine is doing the best of ser twice.
 At the Calumet & Arizona smelter the erection of the fifth furnace is completed. These five furnaces have a capacity of 300 tons per day each. so that an output from the mines of 200 tons or better per day can be continuously handled, allowing ample margin for repairs and overhauling. which items will keep one furnace i hung up a larger part of the time- The capacity above what is now de- rnanded to handle the Calumet & Ari- zona and the Superior & Pittsbure for wardings of ore is to take care of the Increase that will eventually come from the Superior & Pittsburg group
 ORE RAsEBAII CLUB