Victorian Séances: The Toxic Chemistry Behind Mediums' Ghostly Glows

In November 1857, a Jersey City séance took a strange turn when medium Leah Brown claimed her body emitted luminous particles so intense they nearly burned her hands. She cooled them with water and damp earth, a dramatic moment recorded in her memoir. But science tells a different story: the ghostly glow wasn't supernatural—it was likely chemistry. Victorian mediums often used toxic substances like white phosphorus, which ignites in air and can cause severe burns, to create eerie lights. Brown's symptoms match phosphorus exposure, raising questions about the health risks she and others faced. This discovery matters because it exposes the hidden dangers behind spiritualist performances, revealing how the quest to contact the dead often came at a real physical cost. As historians reexamine séance accounts, the line between illusion and injury grows clearer—and the price of belief becomes impossible to ignore.