A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Method for sound production by means of perforated disk through which light is passed on to photoelectric cells; sketch shows connections between piano keys and lamp which excites photoelectric cells.
Photoelectric piano "Spielman"
Le Piano Photoe lectrique "Spielman"
Weiss, E. (author)
Nature (Paris) ; 2836
1930
3 pages
5 Figs.
Article (Journal)
French
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