jan 1, 1901 - Popularized around 1870, the magic lantern was used to project images on glass plates. The predecessor to the modern projector.
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By Andrei Niemimäki (Flickr) [CC BY-SA 2.0 (http://creativecommons.org/licenses/by-sa/2.0)], via Wikimedia Commons
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A Brief History of Educational Technology
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