Note:  Do not rely on this information. It is very old.

Dissolving Views

Dissolving Views are produced by arranging two magic lanterns so that the light from each shall fall precisely on the same place. A view is then projected from one, the light of which is gradually cut off, and at the same time the light from the other is gradually turned on, so that the view projected from the first appears to dissolve into that projected from the second.