According to Charles Musser, Huygens had two key innovations for his magic lantern:
1. Images painted on glass instead of etchings on mirrors.
2. An artificial light source was used instead of the reflection of sunlight. (20)
Glass slides (often more than one) with hand drawn images are the standard aesthetic for these slides. They are then usually mounted in rectangular wooden frames approx. 4 x 7 inches with a 3 inch circular opening for the image. (Musser 30) The various mechanisms attached to the images are described in the Object Narrative section.
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