Titles read: 'Pathetone - presents - MARTIN TAUBMAN and HIS ELECTRONDE in "MUSIC FROM THE AIR"'.
Probably Pathe Studio, London.
Amazing act where Martin Taubman literally plucks a tune from the air by putting his hand before the electric waves coming out of his Electronde machine. It sounds something like a Hawaiian-style electric guitar. Martin uses some foot pedals to control the sound of the machine. Identical shots of Martin are superimposed in a montage. Brief shot of a woman doing an ice-skating spin is superimposed at the bottom of shot towards the end of the piece.
Note: this is probably a theremin.