Show MINING JOINING MINING FOR ELECTRICITY I Great local 10 11 differences In the electrification i of ot the earth are known to exist and now a German engineer suggests that with better knowledge t ledge it m yi be possible to make mining for tor electricity as IS profitable as digging for coal oal or met metals metal als al I In experiments in comparatively lively shallow borings he be has hia obtained weak currents between a small rod of or brassor brass or iron Immersed in the water of the pit and a similar rod burled near the surface He urges contractors min mining minIng mm ing companies and others to take up the problem and perform such suh experiments as testing the current c t between a sixty toot foot copper cylinder clInder at the bottom of or ofa ora ofa a boring of ot feet teet or or more and ad a ai similar cylinder buried burle in moist molt ground atthe surface He also suggests Et Investigating the charges to be obtained from long Iron pipes s burled buried In the ground It seems possible that th t means may mn be found io In this way for charging accumulators from rth currents thus giving a new source of or power light and heat I 1 |