This is a gadget I saw on TV the other day. It's similar to a stereoscopic viewer in that it makes flat images appear to have depth and perspective. The megalethoscope, invented by Carlo Ponti around 1860, works by placing an image with strategically pieced tiny holes in it into the non-viewing end of the box. The viewer then looks down the box which contains a large lens and a light source. These give the image- a transparent picture that was hand colored- depth and the light shines through the tiny holes making the photo appear to glow in strategic places such as lighs or shop windows.

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