California mines and minerals . i • ^i • 1 — S r-— ^Y^ r,o\\vt\ji \^ ^ <\\ The hangers are left in place until two or three sets are put inbelow, and then removed to be used again. Skip guides of six by sixOregon pine are fastened to the end pieces and center braces bymeans of lag screws, with the heads sunk into the guide, so as toprevent the shoe on the skip catching on them. The shaft is linedwith two-inch plank, in twelve-foot lengths, behind the wall plates andend pieces. 102 CALIFORNIA MINES AND MINERALS A cheaper form of timberino; used in the inclined winze in theStickle Mine is sho
California mines and minerals . i • ^i • 1 — S r-— ^Y^ r,o\\vt\ji \^ ^ <\\ The hangers are left in place until two or three sets are put inbelow, and then removed to be used again. Skip guides of six by sixOregon pine are fastened to the end pieces and center braces bymeans of lag screws, with the heads sunk into the guide, so as toprevent the shoe on the skip catching on them. The shaft is linedwith two-inch plank, in twelve-foot lengths, behind the wall plates andend pieces. 102 CALIFORNIA MINES AND MINERALS A cheaper form of timberino; used in the inclined winze in theStickle Mine is shown in Plate HI. The framing is simpler and no. center braces are used. It answered very well for the purpose, butwould not be satisfactory in a working shaft, especially in heavyground. In sinking the Cross Shaft, the following men were employed :Six machine men and six helpers, divided equally on three eight-hourshifts; two engineers on twelve-hour shifts : two machine men withhelpers and three timber men, who worked only when the machineswere running and were allowed full time each month. It was foundthat the timber men could work to the best advantage while theminers were drilling. All hands received three dollars per day. Atthe end of seven months, the shaft was sunk and timbered to a depthof eight hundred and twenty-five feet. The special method used in sinking the Stickle Shaft has manystrong points. The only serious defect was the problem of ventila-tion, aggravated by the large amount of powder gas caused by theblasting. This defect detracted very seriously from what otherwisewould have been an extremely successful method
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