| 31. | Some used a dual-rotating drum slide projector that would have its own mirrors to switch between the drums.
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| 32. | A slide projector underneath flashes the advertising up onto the panel, which acts much like a movie screen.
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| 33. | The magic lantern ( Laterna magica or Lanterna magica ) was the forerunner of the modern slide projector.
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| 34. | The theater initially used the Dove X / DORK automation system for slide projectors and special effects projectors.
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| 35. | At a more advanced level, flip charts, slide projectors, and overhead projectors are more suitable for displaying prepared content.
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| 36. | Then, he stopped walking and unconsciously stood, all 1 . 88m of him, in front of a slide projector.
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| 37. | He lugged around slide projectors and huge stereo sets, and gave them a behind-the-scenes glimpse into the filmmaking process.
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| 38. | For group viewing, a polarized stereoscopic slide projector, silver screen and polarized glasses could be added to the system.
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| 39. | With the help of friendly electronic engineers, Semenoff invented a simple control system that could operate three slide projectors.
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| 40. | It consisted of two slide projectors with a rotating occluding disk that alternatingly blocked the images from the projectors.
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