Bisbee daily review., 1908-10-31
MIAMI COPPER
 PROPERTY Is
 GIVEN BOOST
Copper Expert Visits Globe and Makes Report That Covers Every Point and Shows What Is Being Done.

BOSTON, Oct. 30.--A copper mining authority who has recently visited the property of the Miami Copper Go. at Globe has prepared the following report:
 The Miami Copper Co property com prises 220 acres of mineral lands, sit uated 5k miles west of Globe, Ari- zona
 The existence of commercial ore was first established fl months ago, since which some 5000 feet of devel- -opment work has been done.
 The property is opened by a yer tical shaft 720 feet in depth, with drifts and erosscuts extended at the 27o, 37o and 470-foot levels. Sulphide ore was first encountered at a depth of 20 feet, the material above this point being oxidized, leached gangue.
 The 270-foot level proved one acre of ore, assaying materially above 3 per cent. The faces of the various drifts and crosscuts on this level are stopped in carbonate ore at this depth stnped in carbonate ore assaying about 1 per cent copper. The length of ore blocked out at this depth is 800 feet, with width of slightly over 200 feet
 Sinking was continued from the 270-foct ievel in ore averaging above 2 per cent copper to the 370-foot level. where a great deal of lateral work has been done with gratifying results, the ore body being here demonstrated fo possess a length :f s'i5 feet and a width of over 490 feet, with the faces of all openings east e the shaft still in suIphide ore of good grade.
 The shaft was further continued through ore to the 470-foot level. astounding dimensions have been de yeloped, with the limies still to De reached in three directions, east, north and south. The length of ths ore opened on the 470-foot level is 75O feet, with the east drift still in ore, while the width of ore here de veleped from north to south is HOO feet. Of the six working faces, two have reached the westerly and south erly boundaries, while the other four continue in ore of good grade.
 The shaft is bottomed at depth of 72e feet, the ground intervening from the level above being exactly similar to the partially oxidized ore just referred to.
 There Is now actually blocked on three sides 4,50O,00 tons. In addition it is absolutely safe to state that the probable ore to be developed on the 370 and 470-foot leyeIs is 2,500,000 tons, the average assay copper con tents of all of which is 5S pounds per i, ton
 ': The 7,0O0, 900 tons. of ore practically developed underlie a total of not more than ten surface acres The greater portion of the company's 220- acre tracts shows surface indications of naturalization almost if not equally as favorably as those overiying the i, developed ore. The territory actual : 1y developed comprises a, total length of about 5000 feet, with a proved depth of commercial ore of 250 feet.
 A new four compartment shaft has been started beyond the line of the mineral zone. Included in the equip ment will be the two eight-ton ca. pacity skips. Plans are in preparation for a con centrator having a daily capacity ot 1000 tons; but before the latter is constructed and in commission it is reasonably certain that another con centrator unit, though possibly Of larger capacity, will be receiving the attention Of the management It is therefore quite certain that within IS months this mine will be producing copper at the rate of 100000 pounds per annum, which rate should be al least doubled within two years
 The item of ore transportation will be less than five cents per ton. The caying method of mining is to be adopted; the cost of the ore brought to surface is not expected to exceed -S1 per ton.
 Transportation facilities are to b. provided by the Gila Valley, Globe and Northern, a branch line which is to bt extended from Globe to the property
 The assays of the Miami openings to date have been carefully checkec and rechecked- A net copper recov cry of from 40 to 42 pounds per tor Is confidently looked forward to. Tn, ore viii concentrate about 15 toni into 1, which is an assurance of cred itable concentrating and smeltin, costs. so that viewed from every angi, DO reason whatever for questioning the ability of the company to place it output on the market at cents pc pound presents itself, while from tn treatment of such an enlarged futur tonnage as may be expected, a ma terially lower cost seems more thal probable.