Abstract: It is indeed fitting that this issue of the International Quarterly JOURNAL OF TERRESTRIAL MAGNETISM AND ATMOSPHERIC ELECTRICITY should be selected to emphasize that this one, among the instrumentalities fashioned by Louis Agricola Bauer as tools of investigation in those earth‐sciences which cluster about terrestrial magnetism, was the agency designed to be the expression of the record of progress. It was to serve the Olympian purpose—inspiring to him—to find the meaning of Professor Clerk Maxwell's passage, “What cause, whether exteri...
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