Bisbee daily review., 1915-11-21

as nuCn as U4 lNt NOnNtINdllNE UDl- icies that have been introduced and put into operation Even in 1913 this was highly noticeable when in its Mining Edition. the Review stated that 1913 costs Of production would be under 70 cents as against 1O.34 cents .n 1912. Further comparison ar, made possible in the annual report Of. the company which shows that costs for the year 1914 had been reduced to S22 cents.
 Workings and Methods.
 The principal working entry of tho old Dominion mines is known as shaf A and is located on the east side Of Pnal Creek. It is down 10 a depth oi 14O0 feet and has been made modern in construction in all respects witt four hoisting compartments and a pipe and ladder way From the A shaf 15 drifts have been run at dinarer. levels the deepest being on the 18th
 Auxiliary Co A shaft are other shafts known as B, bottomed at the 500 level c at the 1000 level the Kingden shan and the Grey Shaft. both down 1000 Thcer is also the Transit development
 shaft and a number of small shaftf and adits to open up the property The equipment of the min workiue and electrical and power department are of the best modern type and make and mining methods have been well adapted to conditions East of the Pinal =toping is done by the Till sy. ten Of cut and hll on a 45 per cent incline and very little timbering is necessary for the formation is solid ThorP is also one large shrinkaee stopa. West Of the creek the ground is wet and heavy and square sets of filling are used
 Ore and waste are hoisted in skips and converter silica in cars on cages From the skip dump. which is at A shaft the ore falls into a leading buck ct as does also the customs ore which is discharged by a belt conveyor, fed fro mthe unloading bins at the rail road Out of thi spocket it discharges over an apron feeder to the 36 inch belt conveyor that feeds the mill. Tie maximum of delivery is 200 tons tho hour. From there it is delivered over a 24 inch conveyeor to the samplina mill
 Storage bins for concentrates. coke No. 1 mine run ore for the smelter have been erected, the hillside are also bins for lime. iron Aux ar5 low sulphides Materials from thor handled over a belt conveyor to r. smelter. There are five furnaces rr 231 by A in and four 19S by tf i- ! The slag is tapped to 21 feet eli0t'ca' settlers, ony one of which can -o- either of two furnaces. It is draw into slae cars and hauled by locomc 1 tive power the trains dumped by ] chain from locomotive
 New Equipment Described. i Relative to new machinery install ed and improvements inaugurated, | 1 II Barbdall mine superintendent Ct 1 the old Dominion states as follows i Some Of the new construction worl IIecently completed includes a Crush ] CT Plant and Sample Mill. capable Cf Handling l2O tons per hour, and which was completed towards the end oI i19l3. and a new Concentrator, capable ] of handling 700 tons per 24 hour completed in septe uber, 1914
 Included in the Mill Plant there g. ] Ia 3Oo-ton Minerals Separation Flota ! ton Machine, for treating the slime. | in the ere. Total recovery of copper l in the new mill shows great i'm proyCment over the old one.
 An Oliver Filter has been instaIlet recently, to dowater the Notation cor cntrates.
 In the Smelling Department no new equipment has been added in the last two years. A converter shell, put or the stand in July. 1913. has handled , inc entire copper production for tho Hast 27 months and has not, durina this time, been off the stand for re- pairs lt has produced to date, with out any refining being done, over 3O. 900 tons of copper.
 In the mine during 1915 a new sys tenn of hoisting waste by skips was in stalled, which is working very satis factorily, an dalso two big additional skip pockets were constructed on tho 18th level The l6th level is the pres lent lowest operating level Two 1900 gallon Aldrich Quintuplex pumps were installed on the 18th level in July 1914, but the flow of water on this lev el has been so very heavy and very little drifting work has been done tC date below the lGth level at the "A shat A winze, however, has beer sunk at the west end of the mine from the 16th down to the 18th and devel opment work is proceeding rapidly on the 17th and 18th levels at that point
 Owing to an abnormally heavy rain fall in the winter of 1914-15 @ heavy rush of water broke into the mine in March of this year and flooded the 18t and 18th levels of the mine The 16tF level was unwatered in a months timf but it is only recently that the l8ti level has been reached again. Th, flow of water came from the west sid, of the mine, principally on the 1Ott and l2th levels and, at its height