Bisbee daily review., 1919-05-18
yards were removed from the hin.
 Shaft Entirely of concretu

TWO III lue ulSlIlCl that DOdSIS aH all concrete shaft in the five compaht- ments, the other being the Junction shaft of the c. and A. While this mammoth task was being performed down to the 1700 level the shafts con tinued their workinngs removing daily from 15OO to 1700 tons of ore. It was made possible to work the mines dur tug the concrete work on the shaft by arranging the shifts so that they would not interfere with the working time allotted to the concree workers.
 On the 400 foot level raise is in pro- gress and 1t is now going upward for considerable distance in search of con- centrating ore that will pay. The men on this job are working on the com panies bonus system. At present they have made proress amounting to near ly 30 feet. If they exceed the con- pany's expectations they are given a bonus for each additional fraction above the requirement of a fair days work The bonus decision has had very stimulating effect and is bring ing out of the. men the very best that is in them. Consequently both the company and the men are profiting.
 Pure Air in Remotest Corners
 The ventilation system, which at present it is contemplated to enlarge, is of the highest type and even in the remote corners of the underground the air is free and refreshing even to one who is not accustomed ito the closeness of the underground. The big ventilator is of an immense throwing capacity and its circulation is guided throughout the mine by means of air doors. Another one of these fans is installed and in opera tion on the 140O foot level When the proposed additional improvements have been realized Sacramento shaft will be one of the best and most up to-date ventilated mines in the coun- try.
 To Connect With Dallas Shaft An interesting task has already be- gun on the 1900 foot level which has for its ultimate purpose the connect ing up of the Sacramento working with those of the Dallas shaft Work is now progressing on the tnnneling through the mountain for a distance of 1887 feet and it will require a long time to complete the job. At present about five feet prograss is made each day and when the work has been fin ished the Dallas shaft will be the I,1 .l,.o Al, the Sacramento workings will be 1 hauled to the Dallas shaft by means of the tram electric system. In the drill | ing of this tunnel a self-fed No. IS, liner air drilling machine is being used and about 15 holes are dring drilled each day in which are placed about 50 sticks of dynamite that loosen up 1 the entrance. Fred Murphy is on this job, and he says he's going to stick with until the day when the Sacramen- to mine will invade the Dallas shaft. He said he liked the job.
 Work is also under way from the 1900 foot level in the sinking of a winze, from which the 170O and 1900 levels will be driven to the Dallas shaft. The work has progtessed very : faborably toward the 1500 foot level and as soon as the timber bracing work has been installed drilling will them be centered on the downward drive. In this level a number of stopes are being worked. Most of the stop ing is being done by the square set method and it is found to be more economical and gives more satisfac tion by simplifying the handling oi the ore. In some spots ore is found to be of high grade, while in others ii z. is lower in value and frequently ROth ing but waste. sBy the square setting it enables the miners to sort the ore and generally they bring in a better grade, a paying grade.
 After all the ore has been removed
 from the stopes the sets are filled il tight to prevent caveins. Mules tran
 the fill to the sets which are filled 1T
 tight with waste rock or gobl
 In the construction of the sets younC
 timber is being used in the Sacramen
 to mine and according to Fore 
 man Radcliffe they have proven to b,
 more desirable than the square tim
 bers and not as costly. The sides O
 the sets are held in by wooden lag
 ging and by this method another stop,
 can be started in close proximity tt , the filled in sets without epdangerin a cavein.
 Classes in First Aid
 |, In addition to a vast safety first sys tenn which has greatly reduced tn , number of accidents since it has beel ] installed, classes are held in first ai , work to the injured.
 , Mobile latrines are found on eacl a level and they are kept in sanitar Q condition at all times.
 I Enough for a Book
 , To tell of all the interesting wor L l that is going on in the various level