Technology ... Old

We are so used to Powerpoint, etc., and digital projectors, it's quaint to think about using old fashioned slide projectors and transparency projectors. Here's something even quainter: I ran across Magic Lanterns today when I was looking for information on the Burnham Plan. Magic Lanterns are a precursor to slide projectors -- individually painted glass slides (later photo positives on glass) were projected with a light source, enlarging lens, and crank to create an animation.