MIT Libraries. Movable Messages in Books: Spinning Wheels, Coded Disks, and Volvelles
MIT Libraries: Movable Messages in Books: Spinning Wheels, Coded Disks, and Volvelles Wheels don’t just spin on bikes, buses, and BMW’s. Sometimes they are rings that rotate in the pages of old books, that spin and revolve and whirl, swivel and turn to reveal movable messages: decoders, moon movements, or…. Come by the MIT Libraries Institute Archives and Special Collections reading room to learn about the secrets of movable messages.
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Andrew Wakely, a mathematician, first published The Mariner’s Compass Rectified in 1694. The book was extremely popular; dozens of editions were printed over the course of nearly a century. The “rectifier,” shown here, is used to “readil...