Daily Arizona silver belt., 1910-04-10
Superior & Boston Showing Further Evidence of
 Great Value
TWO HUNDRED TONS
 OUTPUT PER MONTH
Management Contracts for Thousand Feet Diamond
 Drill Sinking

| During the past week the results ob- | tained in development at the Superior
 & Boston mine have been increasingly | favorable. In the Gardner workings the winze put down from the 400foot I level has been continuously in ore av- eraging per cent copper to its present depth of 40 feet. In the bottom of this winze some native copper prevails. Drifting east and west from this winze on the fourth level has advanced about | 100 feet each way and for most of | this distance has been in ore averaging nearly per cent. The ore taken from | the Gardner workings has an iron con | tent averaging about 45 per cent and | contains only about twenty-five per cent of insOluble, thus making a mater ial easily smelted. With the aid of fve-drill air compressor recently in- stalled at the Gardner shaft, the under ground work will be rapidly carried on and should be productive of excellent results in the course of the next few weeks.
 In the eastern part of the mine cross cutting toward the Old Dominion fault is progressing steadily. For the past | ten days the crosscut has been driven through faulted ground containing much mineral, chiefly in the form of hema- tite. It is believed that the crushed state of the ground there is due to | faulting parallel to the Old Dominion vein and that within comparatively short time one of the walls of the lode will be encountered.
 In the Great Eastern and McGaw | workings about two carloads of ore av- | eraging between eight and ten per cent copper are being stoped daily and shipped to the Old Dominion smell ter. This ore is almost wholly oxidized, little or no sulphide being found in that part of the property.
 The method of stOping without the use of timbers which has been worked out and adopted at the Superior X Bos- ton mine by Superintendent J. D. Wan wig and MT. De Rhodes, the mine fore man, has proven very successful not only in accelerating the rate of pro duction, but in decreasing the expense of mining.
 This method consists of putting up raises and breaking down the ore from | the bottom upwards. As the ore is taken out at the base of each raise, the space thus afforded is filled with waste; platform is placed on top of the waste and the same process IS then re- peated, the ore being removed through | chutes in the usual manner. In the course of this work a certain fixed grade is maintained in the stopes. As | +l in vain about twelve feet wide having sound diabase and quartzite walls, this sys- | tenn of ore extraction is admirably adapted to the needs of the company ! at the present time. So effective has | it proven that the Arizona Commercial Copper company has begun stoping its ore in a manner very similar to that
 in use at the Superior & Boston mine. While production and the develop ment of the Gardner ore body is going rapidly forward, various other activ- ties are under way in and near the Me Cav shaft. The 1,000-gallOn Prescott station pump recently installed on the sixth level of the McGaw shaft will probably be put in operation today and will enable the sinking of the shaft toward the eighth level to be con tinued. The Great Eastern winze sunk from the main drift of the Great East ern workings is now about ll3 feet deep and with about twenty-five feet more of sinking will reach the 7OO-foot point where a level will be established and a connection will be made between the winze and the McGaw.
 The Superior & Boston Copper com pany has contracted for about 1000 feet of diamond drilling. This work will be commenced soon in the sixth level station of the McGaw shaft. Two holes will be put down on an incline of about forty-fve degrees. One of these holes will penetrate the Old Do- minion fault. According to present ar engagements the drilling will be con- tinued to tap these veins at depth of about 900 or 1000 feet from the collar of the shaft.
 The steel framework of the two boil CTS being installed south of the Me | Claw shaft is completed and the brick work round them is half done, and will be finished within two or three days.
 The output of the Superior & Bos- 1 ton mine for the month of March was about 200 tons of fine copper. This production would have been cOnsiderab- ly larger had not a shortage of cars curtailed the shipment of ore.
 The Superior X Boston Copper com pany is employing about l5O men in it's various departments. President Will liam G. Rice, who has been in Globe for several weeks, left for his home in Houghton, Michigan, yesterday morning. Consulting Engineer Frank II. Probert is now visiting the mine.