The first lantern slides were created before the invention of
photography by painting transparent images on glass which were
projected onto the wall using a light source such as the magic lantern.
Later photographic processes were discovered that created transparent images on glass plates.
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The green planet in the Green Planet image which can be viewed in the slide show from the home page, was painted with transparent ink on a glass plate, exposed on photographic paper in the darkroom, digitized, and projected onto the Net.
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