Cover of Science and Invention 9, no. 8 (December 1921)

In blue type, the masthead features above a water-color image of a man tucked into bed, sleeping. He's wearing a headset that is affixed to him from a machine that resembles a large clock, which sits on a table beside him. Among the cranks and gears are a series of discs filled with information. For example, “Relativity, Einstein”, “Hamlet, Shakespeare”, “Algebra, Newton”, “Inferno, Dante”. The caption reads, “Work and Learn while You Sleep.”