Tesla says he can transmit messages through the Earth
I think this was the same idea employed by the Navy to communicate with submarines (Extremely Low Frequency or ELF).
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- chris on 04 May 2010
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News - Washington Post (DC)
Location: News - Washington Post (DC) ›1909 ›November ›26-Nov-1909 ›Page 4
Source: Allen County Public Library
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