Then Mr. Bosland was told of the Bhut Jolokia, or ghostpepper, a variety grown in remote Assam, India, that was being studied by the Indian army for use in grenades.
One difference: In the Victorian era, Pepper's Ghost was normally used to reflect actual, physical objects or actors, making them appear "dimensional" in ways that the projected or computer-generated imagery typically used today do not.
For the projection aspect, a San Diego company called AV Concepts used a variation of a visual effect that was discovered in the 19th century, known as Pepper's Ghost.