Daily Arizona silver belt., 1909-10-17

which are 80 by 72 feet. The equipment comprises machinery of the highest type for generating all the power needed to run the plant. There are three engines of the condensing type; two Il by 22 by 36 blower engines, one of which drives No. Connersville blower, the other at present being used to drive Q l00-kilowatt generator for lighting the mine and surface works and supplying power to run the electric locomotive hauling slag. The third engine operates a Nordberg air compressor of 1920 cubic feet per minute capacity. The steam is supplied by a battery of two boilers of the BabcOck & Wilson type and of 300 horse power each. Two 800 gallon Prescott circulating pumps, two David son feed pumps, one COchrane heater, condensers and oil pumps complete the equipment of the power house.
 Model Dust Chamber
 The dust chamber dimensions are 32 by 54 feet. The height is 28 feet. The dust chamber is constructed of brick and steel with foundation of rein forced concrete. The gases and fumes from the furnace are conducted by means of a downtake into the dust chamber. The smelter stack, l25 feet high and eight feet in diameter, is not intended to be used permanently for that purpose. When the converter is installed, a new smelter stack will be erected. This stack will be 175 feet high and l2 feet in diameter. The pres ent stack will then be used for carry ing off the gases from the converter plant.
 The ore bins having five pockets and capacity of 2,000 tons are constructed with steel frames and are lined with wood and steel. Bins and storage for 5000 tons of coke have been provided. The steel oil tank with a capacity of l50,000 gallons is located on the op- posite side of the hill from the shelter, so that, in case of fire, the drainage will be away from the bins and shelter. Both the bins and the oil tank are con neeted with the main line of the Ari- zona Commercial railroad by one main spur and two branch spurs. The en- tire plant has been designed with a view to securing the greatest possible economy in handling ores, fuel and fur mace products.
 From the shelter power house to the Eureka shaft, two pipe lines have been built Both of these lines are of five inch pipe One of these will carry air and the other will conduct steam across the canyon between the smelter and the Eureka shaft. The latter has carry ing pressure of about 160 pounds to provide power at the shaft. In the power house at the shaft there are five boilers with a total of 800 horse power, but it is the plan of the management to maintain this as reserve plant and to supply all the power needed at the smelter and mine from the smeIter pow. CT plant, thus reducing considerably the cost of generating power.
 Work Underground
 The work underground has progressed rapidly. The shaft below the 600-foot level has been unwatered and the cut ting of the station at 700 feet resumed. This should soon be finished and the 700 level drift started. The manage ment is very optimistic as to the char acter of the ore that the vein will be found to carry on the 700-foot level. This confidence appears to be justified by the splendid developments on the 6O2 level; also, by disclosures at the 700-foot station before the thrush of water that flooded the shaft. In cutting station at TOO feet, on the east side of the shaft, the vein was broken into, disclosing some of the richest carbon and glance ore that has yet been found in the mine. The water also came in at that point, and it was found necessary to abandon the cutting of a station on that side of the shaft, and to open one on the west side. This is now nearly finished. The management is desirous of opening the 700-foot level as quickly as possible and will push work in the drift with all possible speed
 The work of preparing the several