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![The phenakistoscope – a couple waltzing](http://upload.wikimedia.org/wikipedia/commons/thumb/d/d3/Phenakistoscope_3g07690b.gif/300px-Phenakistoscope_3g07690b.gif)
Credit: Trialsanderrors
An animated simulation of a phenakistoscope disc. The phenakistoscope is one of the first devices to create moving images and a precursor of the zoopraxiscope and, in turn, cinematography. Conceived as a simple disc to be held vertically in front of a mirror and spun around its axis, the subjects appear to be in motion when viewed through the slits of the disc.