Zenaide Hanenfeldt presenting the RCA Theremin Ether Wave Music Instrument

Zenaide Hanenfeldt presenting the RCA Theremin Ether Wave Music Instrument. Dematerialized music produced solely by deleicate movements of the hands and fingers in the air, without any actual contact with the instrument. Advertisement brochure includes information about the Ether Wave Musical Instrument and "What Leaders Say" with comments by Osspi Gabrilowitsch, Leopold Stokowsky, Sir Henry Wood, Morris Gest and Rudolph Ganz.