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Show netting .Mine TlmlM-M. In n sjsleiii or mine tliula-rlng rnie ahotild Ik) taken In framing the Joints, but the greatest dire exercised lit thla direction b) e-xiK-rleiieeil carpentera la lost If tho tlinlatni nre not pmia'tl) plneeil III tho mine. A lory lmmrtiint lnnttcr. If not the most lnixirtniit, la to ghe cnrrftil ntienllon to wedge when the Hinliera lire III ikisIIIoii Not mil) la It niMvasiiry to proK-rly nml firmly drive the wedges when llrat put In iHisltlnii, but they ahoidd rocclie nt leiitloti from time to lime, to aee that lliey do not liecnmo loosened by tho shifting of the groitnil. In aomo large mines, where the excnvntlnti or large innssea of rock wenkiua the ground nnd 1 tiiiscM It to shift, or where there Is swelling ground, men are detailed whoso duty It la to look "fter the wedge nnd hco that the) remain flrno 1) lu place. |