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Scientific American, Vol. 73, No. 26 (1895) (1895)
leaf 3
erforations in the music sheet, sothat each perforation closes an electric circuit. From the electri¢ contact wires run to a series of elec- tric magnets placed below and spaced from each other exactly as are the keys of the instrument, one magnet corresponding to each key. When the current passes… … ELECTRIC SELF-PLAYING PIANO. performer would do, and nies. © 1895 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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