The "Intonorumori" and Other Obsolete Electronic Musical Instruments.

Obsolete.com has compiled a neat list of 120 years of electronic music, listing obsolete electronic musical instrument from 1870 to 1990.

This one above is the "Intonorumori," created by futurist painter / musician Luigi Russollo:

The or ‘Intonorumori’ or noise machines were a family of acoustic sound generators designed by Russolo to create the palette of sound described in the ‘Art Of Noises’. The individual machines were comically basic in appearance: solid boxes of varying sizes and heights each fitted with a huge metal speaker. [...]

Marinetti, the Italian Futurist poet and helmsman described the experience of demonstrating the noise intoners to the incredulous public as like " showing the first steam engine to a herd of cows"

Link – via AQFL