Sleep prevention system. Artwork from 1924, showing an electrical sleep prevention system allowing a man to work late into the night. The man is talking into a telephone system and reading from a sheet of paper. His chair is on a platform that is lit by a blue, possibly electrostatic, glow, and he is surrounded by a metal coil. Wires connect the coil and platform to an electrical device on the wall (centre right). This artwork was published in the Hungarian magazine Aller Lapja.