The main metal detector was very likely The straightforward electrical conduction metal detector ca. 1830.[41] Electric conduction was also used to Track down metal ore bodies by measuring the conductivity concerning metal rods driven into the bottom. This metal detector is simply awesome! I'm able to personally assure you that https://keeganxcbvr.tinyblogging.com/examine-this-report-on-under-water-metal-detector-76051590