The copper era., 1901-05-02

road from Morenci to Guthrie, IS mile
 distant, where it connects with th,
 Arizona & New Mexico road. Th'
 new line follows down Morenci canyon
 making four complete loops over higt
 trestles. The Detroit concentration, ir
 charge of c. E. Hunt. has crushers
 trommels, thirtytwo jigs, two Bryar
 grinders. two sets high-speed rolls
 twenty-eight belt coucentrators. five
 Bartlett tables, numerous hydraulic
 classifers and settlers-all operated by
 three gas engines. From i50 to 50C
 tons Of ore are milled daily. It is de- livered to the crushing floor by belt conveyors. The jig product is divided 1 into seven grades, which include over
 70 per cent of the mill savings. The
 table products grade all the way from : very coarse and heavy to the lightest shines. The water used in the mill is econOmized, and a small saving of ! values made by system of classifiers and settlers devised by Superintendent i Hunt. The system consists Of eight redwood tanks, 10 feet diameter and ] Is feet deep, each having a tube about one foot in diameter that stands in the center of the tank, the lower end be- 1 ing foot or two above the bottom of the tank. The upper end Of this tube which is even with the top of the tank, receives the tailings from the jigs and tables, discharging same at the bottom of the tank. AS the tank is thus kept full of water, the sand and shines settle to the bottom, the tolerably clear water constantly over- flowing at the top is carried to the mill for use again. The shines from these tanks are concentrated second time. The mill concentrates for Feb ruary produced 2SS tons of copper, the ores having run about 4.20 per cent. copper. The ores concentrated are largely sulphides, very siliceous and carry some aluminium. Considerable amount of copper is also saved by pre- cipitating that in solution by scrap iron.
 The Shannon group of about forty claims belongs to the Shannon Copper Co.,, composed largely of New York, Connecticut. Montana and Arizona people, P. Wiseman being manager. This group covers the principal por- tion of Black mountain, near Metcalf. This mountain stands between Chase and King gulches and is covered by a capping of iron hematite, with shoots of copper carbonates. below which ap- pear to be three parallel lodges, trend- ing north and south, and separated by parallel bodies of porphyry. These three ledges-described as the east, west and center-range from 90 to 100 feet wide, carrying copper sulphides and carbonates, with considerable -hIa>i--oxi xides.-The- -carhonates here are not much decomposed, as in many places, but are firm and hard. At various depths there are found masses of cuprite and occasionally copper glance. Much of the ore here appears to be unusually high grade. The property has a large amount of de- velopment, consisting of a number of tunnels which cut through the moun- tains; some of them are crosscuts and others follow the trend of the ore bodies. The lowest tunnel cuts through the mountain $50 feet below the surface, all the tunnels being con- nected by winzes and upraises. At the surface there is much open-cut work. In many places the ore quar- ried out runs 45 per cent. iron and to 10 per cent. copper. A shipment of 1000 tons from an open cut ran 10 to 15 per cent. copper. The porpbyry horses, which separate the main ledges, carry some copper. This company re- gently bonded an adjoining group Of eleven claims, for which it is said they will pay S65O,OO0 to the A. C. Co. The Shannon people have commenced the erection of a 3O0-ton smelter at point one mile south of Clifton and are building railroad spur to it.
 The purchase of about eighty cop per claims near Clifton by the Gen. eral Electric Go. was noted in this paper in a recent issue. It may be further stated that the territory pur- chase lies in the vicinity of Metcalf, along through the northern section of the known copper district. It is reas- onably assumed that this important purchase will be followed by develop ment, equipment and production.
 A considerable amount of other de- velopment is in progress in the dis trict, much of it of an important char acter. Among the interests included may be mentioned the Copper King, Sterling, Homestake, Medler and Standard. In the Greenlee district to s miles north of Clifton, is diff ferent formation, bearing gold quartz. Parties headed by Colonel Dunham have bonded a group in that section and are preparing for development.
 Such men as Prof Wm. Church. w. A. Parish, John Langton, Prof. Walsh, and G. s. Pitcairn were recently in the district reporting on various proper ties, and this affords some idea Of the quiet but systematic attention the dis trict is receiving. WASCOTT.
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