Sketches of the Philosophy of Apparitions

In this book of 1825, Samuel Hibbert (1782-1848) attempts to uncover the physical or physiological causes which might account for claims of seeing ghosts and other apparitions. Hibbert trained as a doctor, and uses anecdotal and case-study evidence to show that external physical circumstances - such as the use of stimulants, brain inflammation, hallucination during fever, or alcohol withdrawal - a...