Abstract
IN the portion of the abridgment of my Trueman Wood lecture on the above subject published in NATURE of February 2, p. 140, I quoted an instance taken from a paper by Dr. Van der Pol of the ratio between the observed receiving aerial current and that calculated by the diffraction formula for the case of the Nauen-Darien transmission. It appears, however, that a numerical error was made in Dr. Van der Pol's original calculation, which, however, he corrected in the Phil. Mag. for July, 1920. This correction, unfortunately, I overlooked. It appears that the correctly calculated value of the received current is not 0.6 × 10-12 amp., but 1.9 × 10-10. Hence the actual current is only seven thousand times that predicted by the diffraction formula, and not two million times. This discrepancy does not, however, invalidate the conclusion that wave-diffraction alone cannot account for long-distance wireless telegraphy.
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FLEMING, J. Some Problems of Long-distance Radio-telegraphy. Nature 109, 209 (1922). https://doi.org/10.1038/109209d0
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DOI: https://doi.org/10.1038/109209d0
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