An illustration from Hypnotism: Its Facts, Theories and Related Phenomena by Carl Sextus (1893).  The caption reads: "Supposed witches in auto-hypnotized somnambulistic state."

Staring into the depths: an illustration from a 1903 issue of Cosmopolitan magazine.  The caption reads: "Subject fixes the gaze on dancing mirrors."

"Nothing less than a hypnotising machine":  an illustration from an 1897 issue of magazine.

"It is impossible to understand how millions and millions of people all obey a sickly collection of gentlemen that call themselves 'Government!'  The word, I expect, frightens people.  It is a form of planetary hypnosis, and very unhealthy."
—Leonora Carrington, The Hearing Trumpet