Abstract
ALREADY have experiments of the greatest practical value been made with the wonderful invention of Prof. Hughes described in our last number. Dr. B. W. Richardson has been applying it in two ways: as an Audiometer for the measurement of hearing, and a Sphygmophone for measuring the pulse. Both applications were described at the last meeting of the Royal Society.
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The Audiometer . Nature 20, 102–103 (1879). https://doi.org/10.1038/020102a0
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DOI: https://doi.org/10.1038/020102a0