“Phenakistiscope”
Joseph Antoine Ferdinand Plateau was a Belgian physicist and mathematician. He was one of the first people to demonstrate the illusion of a moving image. To do this, he used counterrotating disks with repeating drawn images in small increments of motion on one and regularly spaced slits in the other. Wikipedia
In other words this is the guy we can blame for Youtube.
Today's Joe's Birthday.
He hatched in 1801~CE.
He came up with this Devil's tool a few months later.
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