James Thacher’s An Essay on Demonology, Ghosts and Apparitions was influential as an early 19th-century rationalist critique of superstition, using psychological and physiological explanations to dismiss supernatural beliefs. It provided a detailed, skeptical historical analysis of the Salem Witch Trials, framing them as a result of ignorance, fear, and, specifically, "diseased imagination".

Thacher was a physician and analyzed ghost sightings and witchcraft through the lens of 19th-century science, focusing on the nervous system, dreams, and the power of imagination, rather than supernatural agency, serving for later critical accounts of the 1692 Salem witchcraft delusion, exploring the social panic and psychological factors that fueled the hysteria.

It remains a key text for scholars studying the history of American psychology, folklore, and the evolution of views on the occult, often cited for its pioneering psychological approach to understanding historical "superstition".

Thacher, James. An Essay on Demonology, Ghosts and Apparitions, and Popular Superstitions. Also, an Account of the Witchcraft Delusion at Salem, in 1692. Boston. Carter and Hendee. 1831. 234pp.

A good - working copy with text block sound and generally clean aside from a water stain at the lower interior gutter that extends into the first two signatures. Both boards detached. A good working copy and a very nice candidate for rebinding.