ces itself parallel to those luminous distance; Faraday sought the seat of the phenomena in real of the iron rod. columns. “This observation has been repeatedly made in actions going on in. the medium; they were satisfied that Now bring the unpapered end of the rod up to they had found it in a… … Thomson, ‘“‘one of the most bDril- where near the north geographic pole, and with its north magnetic liant steps made in philosophical exposition of which any instance pole placed somewhere near the length, actually trace out in space the earth’s lines of mag- exists in the history of science. . .…
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