| Figure 9 and Figure 10 are the heat-producing needing waveform with chaotic signal respectively observed in the display interface and oscillograph. |
| When a current is to be measured by the oscillograph, it is passed through the turn of wire in the magnetic field. |
| In Denmark in 1923, an oscillograph light modulator and selenium-cell reproducer were developed. |
| These observations were supported by the use of sound level and oscillograph records. |
| Fig. 14 is a photograph of nine different vowel sounds which have caused the oscillograph to take their pictures. |
| By 1924 they had succeeded in adapting the oscillograph to physiological research, enabling them to visualize amplified nerve impulses on a fluorescent screen. |
