Bisbee daily review., 1904-06-15

The Detroit Copper Co. has under way important additions to its pres ent plant. The concentrator, which has capacity of 500 tons per twenty fcu- hours is being doubled in capacity One-half of the plant will be remodel ed and increased at the time. while the other half continues in operation. It will require eighteen months to complete the change. The new con. centrator will have a floor area 166x240 feet. When remodeled there will be 120 concentrating tables. iO jigs, Chile mills. 6 sets of rolls 16x42 and 2S revolving screens for sizing Power to operate this plant will be furnished by gas engines with total of GOO horse power in 150 H. P. units. The concentrates will all be handled mechanically. An important feature of the improvement will be the sep aration of the concentrating plant from the concentrator The new crushers will occupy a building west of the concentrater and will have a capacity of 100 tons per hour. and all the crushing for the day will be done in ten hours. The sampling mill will be located above the concentrator and ore will te conveyed to it from the latter on & belt conveyor 400 feet long. Crusher and sampler will both be operated by electric motors. The com pany has one of the most complete gas plants in the Southwest, and throughout the entire works-concen- trator. smelter and converters-gas engines furnish the power, the only exceptions being steam power used on locomotives, mine hoists and at the ice plant. New Mexico coal is used in the manufacture of gas and it has been found by the D. c. Go. to be the most economical power avail able. All power, with the exception of the 600 coEcentrator will be local iZed at the new power house. now about completed near the shelter. At present there is developed there a total of S25 horse power by gas en- zines and this will be increased by 300 horse power. giving total of 1925 horse power. Bins of 2,0o0 tons capacity will be installed at the smeIter and steel trestles. and in this and the concentrator a total of TOO tons of steel will be used.
 At Metcalf the Coronado mine sends 300 tons of ore per day to the Clifton smelter. Recently considerable sur face improvement has been going on. Twelve portable dwelling houses, a new store and other buildings have been erected. This and the Metcalf mines on the opposite side of Chase creek belong to the Arizona Copper Co, which also owns the Humbolt, Longfellow. Joey and Yavapai mines of Morenci, all large producers of the red metal. The sulphide ores of the Morenci mines are concentrated at -he A. C. concentrator at Morenci and the product sent to the Clifton smelter by way of Longfellow incline and the Coronado railroad down Chase creek. The possibilities of ere production with these companies are of wonderful extent.
 During the past year the Shannon Copper Go. has brought it's mines and smelter into the ranks of the pro ducers. The mines adjoin the Ari Zona Copper Cos. mines at Metcalf and an incline road conveys the ore 10 the level of the Coronado railroad in Chase creek. By contract with the A C. it is then hauled to the Shannon smelter. one mile south of Clifton As yet it has no converter plant and the high grade matte produced is sold 10 the Arizona Copper Co and re fined at their Clifton plant The Shan non concentrator will be operated within a week at it's full capacity oi 500 tons a day. Within the year { converter plant will be installed. Its two furnaces 42 by ITO inches. have ( capacity of 300 tons each. Beside! their own ore, more or less custom work is being done for smaller prop critics in the camp
 The Monte Cristo property at Met calf. owned by residents. is undel lease to a company of local men with Alex Mclean president and R. c. Mur.llo general manager. NIT Mclean is the A. C. manager at Met calf and MT Murillo is also employe, by the same company. the Mont. Cristo being side issue with them The mine is one mile above Metcalf Since the present company took il late in last December, four shipment have been made to the Shannon smelter with very satisfactory results and work of developing the properi. is steadily advancing.
 East of the Shannon is the Al buckle & Schuman property under de velopment. One claim has 200 fee and the other 1000 feet of shafts drifts and tunnels. High grade ort both sulpbide and carbonate, is oi tained. The work is in charge c J. A. Stewart. Seven men have bee employed for two years past.
 Adjoining phis is the Antietan with three claims. On this there a 146 foot shaft. At the 70 foe level is a drift 115 feet long. whic exposes a body of ore 36 feet wid
 with an average value of A per cer copper, g gold and ' ounces silve