in one picture and absent in the other, and the lens (I) is at the wrong side of the slide. However, experiments with a construction as illustrated in Kircher's book proved that it could work as a point light-source projection system.

The projected image in one of the illustrations shows a person in purgatory or hellfire and the other depicts Death with a scythe and an hourglass. According to legend, Kircher secretly used the lantern at night to project the image of Death on windows of apostates to scare them back into church. Kircher