Abstract
IN a paper on the transmission of electric waves round the earth's surface, read by Prof. H. M. Macdonald before the Royal Society on February 12, some conclusions are recorded which cast new light on the problem of long-distance wireless telegraphy. Prof. Macdonald's point of view is that of simple diffraction, and the paper is the latest one of a notable series of attempts by a number of eminent mathematicians. In the present paper the author reduces his formulæ to figures, and thus makes comparison with experiment easy. The most extensive quantitative experiments yet made over great ranges are those of L. W. Austin in 1910 (Bulletin Bureau of Standards, vol. vii., No. 3), and those of J. L. Hogan in 1913 (Electrician, August 8, 1913). From the former experiments Austin and L. Cohen deduced a formula which has been corroborated by Hogan's results. This formula may be written:
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ECCLES, W. Transmission of Electric Waves Round the Bend of the Earth. Nature 93, 321 (1914). https://doi.org/10.1038/093321a0
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DOI: https://doi.org/10.1038/093321a0
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