Spectropia, or, Surprising spectral illusions : showing ghosts everywhere, and of any colour : with sixteen illustrations

Filmer, John,engraver, James G. Gregory (Firm),publisher · 1864 · New York : Published by James G. Gregory, no. 540 Broadway · 5 pictures

Optical illusions · Visual perception · Color vision · Retina · Ghosts

Internet Archive · Yale University, Cushing/Whitney Medical Library · Public domain (published before 1931) · More from this library