Phenakistascope Discs.

[Chicago]: Charles Swedlund, 1974. First edition. Fourteen discs (each 7” diameter) with a history/instruction card and handle for spinning. All internal elements fine, box very near fine with light bend to lower half. Each disc has one or two silhouettes of human figures that move or interact when viewed through the edge slots at a mirror while the discs spin. Independently invented by Plateau and Stampfer in 1832, the phenakistascope was also known as a stroboscope, and employed as a child’s toy. Chicago-based Swedlund was a long time educator and author, who often employed unusual modes of presenting photographic and other images.