Historically, "The Devil's Bath" was a vernacular expression used in the 17th and 18th centuries to describe (what we now call clinical depression).
2. The Historical Metaphor: "Melancholy is the Devil's Bath" the devils bath
The unusual hue is caused by deposits of sulphur and ferrous (iron) salts that rise to the surface and reflect light. The water is highly acidic, with a pH of approximately 2, and emits a pungent "rotten egg" smell due to hydrogen sulphide gases. Historically, "The Devil's Bath" was a vernacular expression
Despite the name "bath," swimming is strictly prohibited. The water is chemically potent enough to cause severe skin irritation or burns. with a pH of approximately 2