Abstract
IT appears tolerably well established that harmonic echoes are selective echoes; that is to say, echoes which, from whatever cause, select and return one of the harmonies of the original without the fundamental.
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MURPHY, J. Harmonic Echoes. Nature 8, 487 (1873). https://doi.org/10.1038/008487c0
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DOI: https://doi.org/10.1038/008487c0
