Bisbee daily review., 1914-03-01

live feet, are erected what are Styleu pony sets" which are feet by 4 feet inches to hold the chutes which connect with the stopes, annl midway between these are erected pony sets for holding pillar chutes
 When the motor drifts are being cut out smaH manway drifts are put in parallel to them about every 100 feet, and located on the first sublevel 25 feet above. These are offset 12h feet to one side of the motor drift and out of them. at right angles, are run series of stope drifts spaced on ev- cry 20 feet above the ore body. These are so placed as to be directly over the stope chutes on the motor level, so that when raises are put in from the stope drifts they break into them, and make way for the ore to be sent down into the motor cars.
 A Second Sub-LeVel.
 A second sub-level is run at a point about 100 feet above the first sub level, and here manway drifts are
 placed SO as to occupy position i'm mediately over those on the first sub level. These are used for men to go
 up and down, for timber, and for
 ventilation.
 Starting the Breaking of Ore.
 From the first sub-level manway
 raises are put in from the manway
 drifts every twenty-five feet, which
 leaves 7iR feet from the center Of each stope to the second sub-level. a chain ladder. for the convenience oi
 the men being placed in each. While
 this work of making the manwaS
 raises is in progress miners are ra
 work in the chute raises "belling'
 them out, as they here call it. This
 for the reason that the ground beater
 out has the form of an inverted bell Holes are drilled slant-wise towards
 the side of the stope. so that soon tho
 entire width of the stope is cut ou
 wen it is then termed an active
 stope.
 Beating Ground Out to the Cappine
 When these stopes are ready for al
 tack upwards manway sets are erect ed in the manway drifts. These set are SO constructed that the stringer
 on which the posts stand project ou into the stopes so that a Sx3 foo opening is secured, it being cribbed u . on these stringers and serves as al entrance into an active stope from tn first level. In mining a stope two line , of holes are drilled, these being or posite each other all along the bac on bo'h sides of the stope. The on line Is drilled very near the side wall , with the holes being slightly toed 1T to them. The other line. placed abou l four feet away from the side walls, ? drilled so that the holes point at f' slight angle toward the center of tn Q stopo .f the ground is very hard, a ! .onetimes occurs, third line of hole Q is oriled still nearer the center ( F the siOpe Stoper machines are use e and from 12 to Is holes each 6 fee f are drilled in shift and are charge $ with four sticks of thirty to forty pc y cent powder. Seven-foot fuses ar f used and each man blasts his ow n holes going of shift The back stoI g ing plan accumulates more ore unde 1: foot than is needed, and to give rooI k for the miners about forty per cer | of the broken ore from the blasting t taken by the outgoing shift throug e the stope chutes direct to the mote h cars. The men stand on the broke Q ore to beat out the back in the stope l. When a stope has been beaten out z a point about midway between tl h first and second sub-levels the me I. descend into the stope through tl }. manyway raises relieving the expeni
 of maintaining the cribbed manway 1. they being no longer needed
 .2, Cutting Out the Pillars IS When the stopinJ in block of oI e has been carried on sufficiently L weaken it to the point desired the pl n lar is then attacked. The pillar nea y est the fringe drift is first given a