| Author: | Brown, J. H. |
| Subject: | GV, Ghosts, Optical illusions |
| Format: | Text |
| Date issued: | 2020 |
| Language: | English |
| Publisher: | Project Gutenberg, |
| Rights: | Public domain in the USA. |
| Download link: | Spectropia; or, Surprising Spectral Illusions : Showing Ghosts Everywhere, and of Any Colour [electronic resource] / J. H. Brown |