Bisbee daily review., 1919-05-25
FRAILTY OF HUMAN JUDGEMENT SHOWN BY GLOBE SECTION
End Of Mining In Globe And Miami District Predicted
 Score of Years Ago

The falibilty of human judgment has probably never been more strik . ingly illustrated than in the history of the development of copper mining in the Globe-Miami district.
 In 1879 and 1880. when silver min. ing was on the decline, and the cream had been skinned" there were many who believed that the end of mining in the Globe district was in sight And in later years, after copper mining had developed into the leading industry of this dis trict and Globe was known as one of the great copper camps of the west, the pessimist was still on the job. That there was mo ore below the Sth level of the Old Dominion mine" and that grass would be seen within a year, growing in the streets of Globe" were predictions made by so-called copper experts at different times, yet the Old Dominion is a bigger and better mine today than ever before and no one now liv- ing has the prescience to fix the date of its exhaustion.
 Who is there that imagined twenty years ago that the low grade ores in the Miami section could be work ed at a profit; or that more than 50,000,000 tons of commercial ore would be developed by the Inspira- tfon Consolidated and Miami Copper companies?
 Has Disseminated Ore Body
 Any doubt entertained of the eX- tension of the disseminated ore bodies beyond the boundary lines or the Inspiration Consolidated and Miami companies has been dispelled by the development in the proper ties of the Porphyry and Barney Cop per companies, soon to be consolidat- ed under the name of the Porphyry Consolidated Copper company, which adjoin on the west and south the Live Oak, the richest mine of the In spiration Consolidated company.
 The Porphyry has been partially developed by a shaft to a depth of ITS feet, and by levels at $50 and $50 feet. In sinking, the shaft, pass ed through 90 feet of commercial ore averaging about ? 1-2 per cent cop per, and also considerable low grade ore. The shaft is bottomed in ore carrying chalcocite ,bornite. and chal- copyrite. The principal ore develop ments are on the 650level The crosscut on that level penetrated an orebody diagonally 200 feet, the act nF hn ahn so feet. of average commercial grade. 1
 Indicates Great OreSody
 The west drift from this crosscut at 150 feet encountered a leached-out vein which continues for about 450 feet in width, deeply stained with iron and which was at one time, no doubt, filled with copper and was through chemical action, leached out and deposited in the form of chalco- cite at lower depth. The management attaches great importance to this leached formation, believing that it strongly indicates the presence of a large body of chalcocite and primary
 (Continued on Page Sixteen ore below the oxidized zone. Along this Nlevel a chamber is being cut preparatory to sinking a winze which is expected to penetrate a high grade orebody that is disclosed in the drift about 40 feet to the southeast.
 This drift is being continued west and has about 250 feet to go to reach Barney drill hole No. 1, in which ore was penetrated at a depth of 800 feet. Two or three samples taken from this drill hole ran 1 IA per. cent copper, and the third sample 3 1-2 per cent. When the drift reaches the drill hole raise will be started for the purpose of developing the ore located by the drill. The princi- pal development work planned for the immediate future is continuation : of the drift northwesterly from the winZe, and main drift toward the drill hole. Later the management proposes to resume sinking the shaft and will probably continue it to the depth of 1000 or 120OO feet.
 The information here given was obtained by a representative of the Record, who. in company of Manager J. B. Coplen. and Mine Foreman w. E. Carter. inspected the workings at the 65O-foot level