NEW YORK, OCTOBER 12, 1878. ["$3.20 per Annum. 15."1 Vol. XXXIX.—No. L [postage prepaid.] [new series.] produce fractions of a tone to illustrate the phenomena of NEW ELECTRICAL DIAPASON. with a single mirror, so that it was actuated by both tongues. consonance and dissonance. To each tongue I… … With a view to the construction of an instrument that A standard, D, projects upward from the frame and sup- FRONT ELEVATION OF ELECTRICAL DIAPASON. would operate continuously and produce both sounds and ports an adjustable tube, which is parallel with the tongues, figures, I first arranged two…
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