Text: That vibrations are excited by sound is beautifully exemplified by the eidophone, an instrument invented, I believe, by Mrs Watts-Hughes, and with which I have seen that lady experiment. Dry sand is scattered on a diaphragm on which the eidophone concentrates the vibrations from music played near it. The sand, as it were, dances in time to the music and, when the music stops, is found to settle into definite forms, sometimes like a tree or a flower, or else some geometrical figure, but never a confused jumble. Perhaps in this we may find the origin of the legends regarding the creative power of Orpheus' lyre, and also the sacred dances of the ancients ó who knows! [Thomas Troward]

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