The mermaid in the fishbowl: the rise of optical illusions and magical effects
The nineteenth century saw the publication of several books explaining how magical effects and spectral appearances could be performed using the science of optics. It started in 1831, when Sir David Brewster (famed for his discovery of Brewster polarization and inventing the kaleidoscope) published “Letters on Natural Magic.” In this book, Brewster showed how to produce images of ghosts using partially silvered mirrors and by using a magic lantern to project images onto screens or onto clouds of vapor.
