IASLonline NetArt: History of Computer Art II.3 Cybernetic Sculptures
Zachary Dempster

John Billingsley developed the analog circuit for the measurement of the audio input, meanwhile Ihnatowicz realised the `backbone´, its hydraulics, and the analog computer being hidden in the socle and used for the coordination of the motions. The technology of the hydraulicservo system was based on biological prefigurations.