The Weight Recorder (The Synesthetic Recorder of Involuntary Memory), by Weiche Wu, records the changing weight of a person over a period of time — it makes marks on a disk that responds to the passed life. The device is a mechanical scale with a compass holding a pencil that can draw lines on the tracing paper disk attached to the statistical part. When the user stands on the scale, the compass turns and the pencil draws an arc. The radius of the compass can be adjusted in every usage, so the arcs are drawn concentrically. The user can use the devices over a certain period of time, eventually the user will get a graphical ‘life-tracing’ on a disk.