This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Phenakistiscope. Plateau's phenakistiscope Disque de Phnakistiscope Een schijf van een fenakistiscoop nl depuis Joseph Plateau Corresp Math Phys VII Author PDold Phenakistoscope
Page 2023 Free-images.com. All images are Public Domain